Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.