APA (7th ed.) Citation

Duckworth, W. E. (1965). A guide to operational research / by W.E. Duckworth (2nd ed.). Methuen.

Chicago Style (17th ed.) Citation

Duckworth, W. E. A Guide to Operational Research / by W.E. Duckworth. 2nd ed. Methuen, 1965.

MLA (9th ed.) Citation

Duckworth, W. E. A Guide to Operational Research / by W.E. Duckworth. 2nd ed. Methuen, 1965.

Warning: These citations may not always be 100% accurate.