Dyfyniad APA

Books, P. R. (1979). New encyclopedia of science. Purnell Reference Books.

Dyfyniad Arddull Chicago

Books, Purnell Reference. New Encyclopedia of Science. Purnell Reference Books, 1979.

Dyfyniad MLA

Books, Purnell Reference. New Encyclopedia of Science. Purnell Reference Books, 1979.

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