एपीए उद्धरण

Roberts, A. D. (1951). Introduction to reference books. (2nd ed.).

शिकागो स्टाइल उद्धरण

Roberts, A. D. Introduction to Reference Books. 2nd ed. 1951.

एमएलए उद्धरण

Roberts, A. D. Introduction to Reference Books. 2nd ed. 1951.