APA (7th ed.) Citation

Levin, H. L. (1994). The earth through time (4. ed., updated version.). Saunders College Publ.

Chicago Style (17th ed.) Citation

Levin, Harold L. The Earth Through Time. 4. ed., updated version. Fort Worth [u.a.]: Saunders College Publ, 1994.

MLA (9th ed.) Citation

Levin, Harold L. The Earth Through Time. 4. ed., updated version. Saunders College Publ, 1994.