एपीए उद्धरण

Gwinn, R. P. (1973). 1974 Britannica yearbook of science and the future. Britain: Helen Hemingway Benton.

शिकागो स्टाइल उद्धरण

Gwinn, Robert P. 1974 Britannica Yearbook of Science and the Future. Britain: Helen Hemingway Benton, 1973.

एमएलए उद्धरण

Gwinn, Robert P. 1974 Britannica Yearbook of Science and the Future. Britain: Helen Hemingway Benton, 1973.