Dyfyniad APA

O'Sullivan, J., & Hilliard, J. (2014). The law of contract (6th ed.). Oxford University Press.

Dyfyniad Arddull Chicago

O'Sullivan, Janet, and Jonathan Hilliard. The Law of Contract. 6th ed. New York: Oxford University Press, 2014.

Dyfyniad MLA

O'Sullivan, Janet, and Jonathan Hilliard. The Law of Contract. 6th ed. Oxford University Press, 2014.

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