एपीए उद्धरण

Bernal, J. D. (1969). Science in history. Australia: A Pelican books.

शिकागो स्टाइल उद्धरण

Bernal, J. D. Science in History. Australia: A Pelican books, 1969.

एमएलए उद्धरण

Bernal, J. D. Science in History. Australia: A Pelican books, 1969.