एपीए उद्धरण

(1972). Encyclopaedia Britannica year book of science and the future. Encyclopaedia Britanica, Inc..

शिकागो स्टाइल उद्धरण

Encyclopaedia Britannica Year Book of Science and the Future. Chicago: Encyclopaedia Britanica, Inc., 1972.

एमएलए उद्धरण

Encyclopaedia Britannica Year Book of Science and the Future. Encyclopaedia Britanica, Inc., 1972.