एपीए उद्धरण

Beer, S. (1963). An Essay On Operational Research. Sigma.

शिकागो स्टाइल उद्धरण

Beer, Stafford. An Essay On Operational Research. Sussex: Sigma, 1963.

एमएलए उद्धरण

Beer, Stafford. An Essay On Operational Research. Sigma, 1963.