Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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