Cita APA (7a ed.)

Duckworth, W. E. (1967). A guide to operational research (1st published, repr.). Methuen & Co.

Cita Chicago Style (17a ed.)

Duckworth, W. E. A Guide to Operational Research. 1st published, repr. London: Methuen & Co, 1967.

Cita MLA (9a ed.)

Duckworth, W. E. A Guide to Operational Research. 1st published, repr. Methuen & Co, 1967.