एपीए उद्धरण

Cochran, W. G. (1972). Sampling techniques (2.). Wiley Eastern Limited.

शिकागो स्टाइल उद्धरण

Cochran, W G. Sampling Techniques. 2. New Delhi: Wiley Eastern Limited, 1972.

एमएलए उद्धरण

Cochran, W G. Sampling Techniques. 2. Wiley Eastern Limited, 1972.