APA (7th ed.) Citation

Ley, W., & Bonestell, C. (1949). The conquest of space. Viking Press.

Chicago Style (17th ed.) Citation

Ley, Willy, and Chesley Bonestell. The Conquest of Space. New York: Viking Press, 1949.

MLA (8th ed.) Citation

Ley, Willy, and Chesley Bonestell. The Conquest of Space. Viking Press, 1949.