APA (7th ed.) Citation

Wollheim, D. A., Simak, C. D., Vance, J., & Delany, S. R. (1972). Trilogy of the future. Sidgwick & Jackson.

Chicago Style (17th ed.) Citation

Wollheim, Donald A., Clifford D. Simak, Jack Vance, and Samuel R. Delany. Trilogy of the Future. London: Sidgwick & Jackson, 1972.

MLA (9th ed.) Citation

Wollheim, Donald A., et al. Trilogy of the Future. Sidgwick & Jackson, 1972.