Citazione Stile APA (7a Edizione)

Williams, N. (2009). Duty and responsibility. Epitome Books.

Citazione stile Chigago Style (17a edizione)

Williams, Nancy. Duty and Responsibility. New Delhi: Epitome Books, 2009.

Citatione MLA (9a ed.)

Williams, Nancy. Duty and Responsibility. Epitome Books, 2009.