APA (7th ed.) Citation

Kerr, A. J. (1989). The principles of the law of contract (4. ed.). Butterworths.

Chicago Style (17th ed.) Citation

Kerr, Alastair J. The Principles of the Law of Contract. 4. ed. Durban: Butterworths, 1989.

MLA (9th ed.) Citation

Kerr, Alastair J. The Principles of the Law of Contract. 4. ed. Butterworths, 1989.