APA (7 वां संस्करण) प्रशस्ति पत्र

Layard, P. R. G. (1972). Cost-benefit analysis: Selected readings. Penguin Education.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Layard, P. R. G. Cost-benefit Analysis: Selected Readings. Harmondsworth, Eng. ; Baltimore: Penguin Education, 1972.

एमएलए (8वां संस्करण) प्रशस्ति पत्र

Layard, P. R. G. Cost-benefit Analysis: Selected Readings. Penguin Education, 1972.