APA (7th ed.) Citation

Duckworth, W. E. A guide to operational research. Methuen.

Chicago Style (17th ed.) Citation

Duckworth, Walter Eric. A Guide to Operational Research. London: Methuen.

MLA (9th ed.) Citation

Duckworth, Walter Eric. A Guide to Operational Research. Methuen.

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