Dyfyniad APA

Young, R. G. e. (1969). 1970 Britannica yearbooks of science and the future. Encyclopaedia Britannica.

Dyfyniad Arddull Chicago

Young, Richard G ed. 1970 Britannica Yearbooks of Science and the Future. Chicago: Encyclopaedia Britannica, 1969.

Dyfyniad MLA

Young, Richard G ed. 1970 Britannica Yearbooks of Science and the Future. Encyclopaedia Britannica, 1969.

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