APA (7th ed.) Citation

Levin, H. L. (1999). The Earth through time (6th ed.). Fort Worth : Saunders College Pub.

Chicago Style (17th ed.) Citation

Levin, Harold L. The Earth Through Time. 6th ed. Fort Worth : Saunders College Pub, 1999.

MLA (9th ed.) Citation

Levin, Harold L. The Earth Through Time. 6th ed. Fort Worth : Saunders College Pub, 1999.

Warning: These citations may not always be 100% accurate.