APA (7th ed.) Citation

Ridpath, I. (1976). The Illustrated encyclopedia of astronomy and space. Thomas Y. Crowell.

Chicago Style (17th ed.) Citation

Ridpath, Ian. The Illustrated Encyclopedia of Astronomy and Space. New York: Thomas Y. Crowell, 1976.

MLA (8th ed.) Citation

Ridpath, Ian. The Illustrated Encyclopedia of Astronomy and Space. Thomas Y. Crowell, 1976.