APA (7th ed.) Citation

Sagan, C., & Leonard, J. N. (1967). Planets / Carl Sagan, Jonathan Norton Leonard and the editors of Time-Life Books ; consulting editors, René Dubos, Henry Margenau, C.P. Snow. Time-Life International.

Chicago Style (17th ed.) Citation

Sagan, Carl, and Jonathan Norton Leonard. Planets / Carl Sagan, Jonathan Norton Leonard and the Editors of Time-Life Books ; Consulting Editors, René Dubos, Henry Margenau, C.P. Snow. [New York]: Time-Life International, 1967.

MLA (9th ed.) Citation

Sagan, Carl, and Jonathan Norton Leonard. Planets / Carl Sagan, Jonathan Norton Leonard and the Editors of Time-Life Books ; Consulting Editors, René Dubos, Henry Margenau, C.P. Snow. Time-Life International, 1967.

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