एपीए उद्धरण

Bernal, J. D. (1969). Science in History. All India People's Science Network.

शिकागो स्टाइल उद्धरण

Bernal, J. D. Science in History. New Delhi: All India People's Science Network, 1969.

एमएलए उद्धरण

Bernal, J. D. Science in History. All India People's Science Network, 1969.