Citazione Stile APA (7a Edizione)

Royston, A., King, D., Cradock-Watson, J., & Hopkins, D. (1992). Birds. Aladdin Books.

Citazione stile Chigago Style (17a edizione)

Royston, Angela, Dave King, Jane Cradock-Watson, e Dave Hopkins. Birds. New York: Aladdin Books, 1992.

Citatione MLA (8a ed.)

Royston, Angela, et al. Birds. Aladdin Books, 1992.