Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

Montgomery, Carla W., i David Dathe. Earth, Then and Now. 2nd ed. Dubuque, Iowa: W. C. Brown, 1994.

Cita MLA (9th ed.)

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