APA-ийн эшлэл(7 дахь хэвлэлт)

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

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

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

MLA -ийн эшлэл (9 дэх хэвлэлт)

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