Citazione Stile APA (7a Edizione)

Barton, M. (2001). The international wildlife encyclopedia Vol 1 to Vol 21. Marshall Cavendish corporation.

Citazione stile Chigago Style (17a edizione)

Barton, Maurice. The International Wildlife Encyclopedia Vol 1 to Vol 21. New York: Marshall Cavendish corporation, 2001.

Citatione MLA (9a ed.)

Barton, Maurice. The International Wildlife Encyclopedia Vol 1 to Vol 21. Marshall Cavendish corporation, 2001.