Dyfyniad APA

Silva, M. e. (1972). 1973 Britannica yearbooks of science and the future. Encyclopaedia Britannica.

Dyfyniad Arddull Chicago

Silva, Michel ed. 1973 Britannica Yearbooks of Science and the Future. Chicago: Encyclopaedia Britannica, 1972.

Dyfyniad MLA

Silva, Michel ed. 1973 Britannica Yearbooks of Science and the Future. Encyclopaedia Britannica, 1972.

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