APA (7th ed.) Citation

Montgomery, C. W., & Dathe, D. (1994). Earth then and now (2nd ed.). Wm. C. Brown Publishers.

Chicago Style (17th ed.) Citation

Montgomery, Carla W., and David Dathe. Earth Then and Now. 2nd ed. Dubuque, IA: Wm. C. Brown Publishers, 1994.

MLA (9th ed.) Citation

Montgomery, Carla W., and David Dathe. Earth Then and Now. 2nd ed. Wm. C. Brown Publishers, 1994.