एपीए उद्धरण

(1991). The Penguin dictionary of physics (2nd ed.). London: Penguin Books.

शिकागो स्टाइल उद्धरण

The Penguin Dictionary of Physics. 2nd ed. London: Penguin Books, 1991.

एमएलए उद्धरण

The Penguin Dictionary of Physics. 2nd ed. London: Penguin Books, 1991.