APA (7th ed.) Citation

Ley, W., & Von Braun, W. (1956). The exploration of Mars. Viking Press.

Chicago Style (17th ed.) Citation

Ley, Willy, and Wernher Von Braun. The Exploration of Mars. New York: Viking Press, 1956.

MLA (8th ed.) Citation

Ley, Willy, and Wernher Von Braun. The Exploration of Mars. Viking Press, 1956.