Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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