Cita APA (7a ed.)
Turk, J. (1989). Introduction to environmental studies (3rd ed.). Saunders college.
Cita Chicago Style (17a ed.)
Turk, Jonathan. Introduction to Environmental Studies. 3rd ed. Philadelphia: Saunders college, 1989.
Cita MLA (9a ed.)
Turk, Jonathan. Introduction to Environmental Studies. 3rd ed. Saunders college, 1989.
Precaución: Estas citas no son 100% exactas.