APA (7th ed.) Zitazioa

Oberlander, T. M., & Muller, R. A. (1987). Essentials of physical geography today (2nd ed.). Random House.

Chicago Style (17th ed.) Zitazioa

Oberlander, Theodore M., eta Robert A. Muller. Essentials of Physical Geography Today. 2nd ed. New York: Random House, 1987.

MLA (9th ed.) Zitazioa

Oberlander, Theodore M., eta Robert A. Muller. Essentials of Physical Geography Today. 2nd ed. Random House, 1987.