APA (7th ed.) Citation

Duckworth, W. E., Gear, A. E., & Lockett, A. G. (1977). A guide to operational research (3d ed.). Chapman and Hall ; Wiley.

Chicago Style (17th ed.) Citation

Duckworth, W. E., A. E. Gear, and A. Geoffrey Lockett. A Guide to Operational Research. 3d ed. London : New York: Chapman and Hall ; Wiley, 1977.

MLA (9th ed.) Citation

Duckworth, W. E., et al. A Guide to Operational Research. 3d ed. Chapman and Hall ; Wiley, 1977.