APA (7th ed.) Citation

Conrad, J., & Jack Conrad. (1967). The Many Worlds of Man. Macmillan.

Chicago Style (17th ed.) Citation

Conrad, Jack, and Jack Conrad. The Many Worlds of Man. London: Macmillan, 1967.

MLA (9th ed.) Citation

Conrad, Jack, and Jack Conrad. The Many Worlds of Man. Macmillan, 1967.