Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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