Dyfyniad APA

(1949). Science: Nos 2844 - 2870. American association for the advancement of science.

Dyfyniad Arddull Chicago

Science: Nos 2844 - 2870. Lancaster: American association for the advancement of science, 1949.

Dyfyniad MLA

Science: Nos 2844 - 2870. American association for the advancement of science, 1949.

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