Citazione Stile APA (7a Edizione)

Turk, J. (1989). Introduction to environmental studies. Saunders College.

Citazione stile Chigago Style (17a edizione)

Turk, Jonathan. Introduction to Environmental Studies. New York: Saunders College, 1989.

Citatione MLA (9a ed.)

Turk, Jonathan. Introduction to Environmental Studies. Saunders College, 1989.