Cita APA (7th ed.)

DUCKWORTH, W. (1962). Guide to operational research. Methuen.

Cita Chicago (17th ed.)

DUCKWORTH, W.E. Guide to Operational Research. London: Methuen, 1962.

Cita MLA (9th ed.)

DUCKWORTH, W.E. Guide to Operational Research. Methuen, 1962.