Citazione Stile APA (7a Edizione)

Wilken, S., & Villiers, T. (2002). Wilken and Villiers the law of waiver, variation, and estoppel (2nd ed.). Oxford University Press.

Citazione stile Chigago Style (17a edizione)

Wilken, Sean, e Theresa Villiers. Wilken and Villiers the Law of Waiver, Variation, and Estoppel. 2nd ed. London ; New York: Oxford University Press, 2002.

Citatione MLA (9a ed.)

Wilken, Sean, e Theresa Villiers. Wilken and Villiers the Law of Waiver, Variation, and Estoppel. 2nd ed. Oxford University Press, 2002.