1.Harvard referencing System

In the Harvard system, the author’s surname and year of publication or page number are cited in the text of your work.

The full details of the book are included in a reference list at the end of the assignment. 

In-text citation
“An effective structure is important” (Redman, 2006, p.22)

Reference list 

Redman, P., 2006. Good essay writing: a social sciences guide. 3rd ed. London: Open University in assoc. with Sage.

2. Oxford referencing System

In the Oxford referencing system, the author’s initial and surname is displayed in the footnote alongside title of book, journal or article, then followed by country of publication and publisher , then year of publication and page number cited.
Since it uses footnotes, each cited sources in text would be represented by a footnote number.

See examples below:
Reference list example

Ratnagar, S., Trading Encounters: From the Euphrates to the Indus in the Bronze Age, New Delhi, Oxford University Press, 2004.
Footnote Example

1 S. Ratnagar, Trading Encounters: From the Euphrates to the Indus in the Bronze Age, New Delhi, Oxford University Press, 2004, p. 23.

3.OSCOLA referencing system

For Cases (Primary Source)
Give the party names, followed by the neutral citation, followed by the Law Reports citation (eg AC,
Ch, QB). If there is no neutral citation, give the Law Reports citation followed by the court in brackets. If the case is not reported in the Law Reports, cite the All ER or the WLR, or failing that a specialist report.
Corr v IBC Vehicles Ltd [2008] UKHL 13, [2008]
1 AC 884
R (Roberts) v Parole Board [2004] EWCA Civ
1031, [2005] QB 410

Secondary Source

Give the author’s name in the same form as in the publication, except in bibliographies, where you should give only the surname followed by the initial(s). Give relevant information about editions,
translators and so forth before the publisher, and give page numbers at the end of the citation, after the brackets.

Thomas Hobbes, Leviathan (first published 1651, Penguin 1985) 268
Gareth Jones, Goff and Jones: The Law of Restitution (1st supp, 7th edn, Sweet & Maxwell 2009)

Journal articles
Paul Craig, ‘Theory, “Pure Theory” and Values in Public Law’ [2005] PL 440
Graham Greenleaf, ‘The Global Development of Free Access to Legal Information’ (2010)
1(1) EJLT < http://ejlt.org//article/view/17 >accessed 27 July 2010

4.APA referencing system

List of References
At the end of your essay, place a list of the references you have cited in the text. Arrange this in alphabetical order of authors’ surnames, and then chronologically (earliest publication date first) for each author where more than one work by that author is cited. The author’s surname is placed first, followed by initials or first name, and then the year of publication is given. If the list contains more than one item published by the same author(s) in the same year, add lower case letters immediately after the year to distinguish them (e.g. 1983a). These are ordered alphabetically by title disregarding any initial articles (a, an or the).
The reference list includes only the sources you have used in any submission. APA Style requires reference lists, not bibliographies.
The reference list begins a new page with the centred heading – References

Double-space all reference entries.

Reference list entries should be indented half an inch (five to seven spaces) on the second and subsequent lines of the reference list for every entry – a hanging indent is the preferred style. (i.e. entries should begin flush left, and the second and subsequent lines should be indented).
Arrange entries in alphabetical order by the surname of the first author as the letters appear (e.g. M, Mac, MacD, Mc).
If there is no author, the title moves to the author position (filed under the first significant word of the title). If the title in this instance begins with numerals, spell them out.
States and territories are abbreviated in the location section of the publication information. For U.S. states, use the official two-letter postal service abbreviation (e.g. New York, NY: McGraw-Hill). Spell out country names if outside Australia or the United States.

Books (print and online)
General forms (when DOIs are assigned, use them):
Author, A. A. (year). Title of work. doi:xx.xxxxxxxxxxxxxxxx
Author, A. A. (year). Title of work. Location: Publisher.
Author, A. A. (year). Title of work. Retrieved from http://www.xxxxxxxxxxx
Author, A. A. (year). Title of work. Retrieved from xxxxxxxxxxxx database.

5.Chicago referencing system

The Chicago Manual of Style presents two basic documentation systems: (1) notes and bibliography and (2) author-date. Choosing between the two often depends on subject matter and the nature of sources cited, as each system is favored by different groups of scholars.

One author
Michael Pollan, The Omnivore’s Dilemma: A Natural History of Four Meals (New York: Penguin, 2006), 99–100.

Journal Article

1. Joshua I. Weinstein, “The Market in Plato’s Republic,” Classical Philology 104 (2009): 440.
2. Weinstein, “Plato’s Republic,” 452–53.

6.MLA referencing system

MLA (Modern Language Association) style is most commonly used to write papers and cite sources within the liberal arts and humanities.
Basic Format for MLA
Lastname, Firstname. Title of Book. City of Publication: Publisher, Year of Publication. Medium of Publication.

Book with one author
Gleick, James. Chaos: Making a New Science. New York: Penguin, 1987. Print.

***Please note that these are just examples of common referencing systems out there. There are many referencing systems – as such we advise you to provide us with your university guidelines when ordering to avoid any misunderstanding.***