APA (7th ed.) Citation

Urry, S. (1991). An introduction to operational research: The best of everything. Longman Scientific & Technical.

Chicago Style (17th ed.) Citation

Urry, Syd. An Introduction to Operational Research: The Best of Everything. Burnt Mill, Harlow, Eng.: Longman Scientific & Technical, 1991.

MLA (9th ed.) Citation

Urry, Syd. An Introduction to Operational Research: The Best of Everything. Longman Scientific & Technical, 1991.