APA ציטוט

Turk, J. (1989). Introduction to environmental studies (3rd ed.). Saunders college.

Chicago Style (17th ed.) Citation

Turk, Jonathan. Introduction to Environmental Studies. 3rd ed. Philadelphia: Saunders college, 1989.

ציטוט MLA

Turk, Jonathan. Introduction to Environmental Studies. 3rd ed. Saunders college, 1989.