Cita APA (7th ed.)

Gordon, R. E., Gordon, K. K., & Gunther, M. (1961). The split-level trap. Dell Pub.

Cita Chicago (17th ed.)

Gordon, Richard E., Katherine K. Gordon, i Max Gunther. The Split-level Trap. New York: Dell Pub, 1961.

Cita MLA (9th ed.)

Gordon, Richard E., et al. The Split-level Trap. Dell Pub, 1961.