एपीए उद्धरण

Bernal, J. D. (1969). Science in history. Illustrated edn. 4v.

शिकागो स्टाइल उद्धरण

Bernal, J. D. Science in History. Illustrated Edn. 4v. 1969.

एमएलए उद्धरण

Bernal, J. D. Science in History. Illustrated Edn. 4v. 1969.