Παραπομπή σε μορφή APA (7η εκδ.)

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

Παραπομπή σε μορφή Chicago (17η εκδ.)

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

Παραπομπή σε μορφή MLA (9th εκδ.)

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