एपीए उद्धरण

J E Nichols. (1957). Livestock Improvement: In Relation to Heridity and Enviorment (4.). London.

शिकागो स्टाइल उद्धरण

J E Nichols. Livestock Improvement: In Relation to Heridity and Enviorment. 4. London, 1957.

एमएलए उद्धरण

J E Nichols. Livestock Improvement: In Relation to Heridity and Enviorment. 4. London, 1957.