APA (7th ed.) Citation

Smith, R. A., & Clarke, A. C. (1954). The exploration of the moon. Harper.

Chicago Style (17th ed.) Citation

Smith, R. A., and Arthur C. Clarke. The Exploration of the Moon. New York: Harper, 1954.

MLA (9th ed.) Citation

Smith, R. A., and Arthur C. Clarke. The Exploration of the Moon. Harper, 1954.