Cita APA (7a ed.)

Gross, H. H., & Everson, R. C. (1983). World geography (Revised, 2. [print].). Allyn and Bacon.

Cita Chicago Style (17a ed.)

Gross, Herbert H., y Roy C. Everson. World Geography. Revised, 2. [print]. Boston [u.a.]: Allyn and Bacon, 1983.

Cita MLA (9a ed.)

Gross, Herbert H., y Roy C. Everson. World Geography. Revised, 2. [print]. Allyn and Bacon, 1983.