एपीए उद्धरण

Layard, R. (1972). Cost-benefit analysis. Penguin Education.

शिकागो स्टाइल उद्धरण

Layard, Richard. Cost-benefit Analysis. London: Penguin Education, 1972.

एमएलए उद्धरण

Layard, Richard. Cost-benefit Analysis. Penguin Education, 1972.