Cita APA (7a ed.)

Whipple, F. L. (1941). Earth, moon and planets. Blakiston Company.

Cita Chicago Style (17a ed.)

Whipple, Fred L. Earth, Moon and Planets. Philadelpia: Blakiston Company, 1941.

Cita MLA (9a ed.)

Whipple, Fred L. Earth, Moon and Planets. Blakiston Company, 1941.