APA citiranje

Levin, H. L. (1983). The earth through time (2nd ed.). Saunders College Pub..

Chicago Style (17th ed.) Citation

Levin, Harold L. The Earth Through Time. 2nd ed. Philadelphia: Saunders College Pub., 1983.

MLA citiranje

Levin, Harold L. The Earth Through Time. 2nd ed. Saunders College Pub., 1983.