APA সাইটেশন

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

শিকাগো স্টাইলে সাইটেশন

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

এমএলএ সাইটেশন

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