APA aipamena

Levin, H. L. (1996). The Earth through time (5th ed.). Saunders College Pub.

Chicago Style aipamena

Levin, Harold L. The Earth Through Time. 5th ed. Fort Worth: Saunders College Pub, 1996.

MLA aipamena

Levin, Harold L. The Earth Through Time. 5th ed. Saunders College Pub, 1996.