Dyfyniad APA

(1950). Science: Nos 2871 - 2896. American association for the advancement of science.

Dyfyniad Arddull Chicago

Science: Nos 2871 - 2896. Lancaster: American association for the advancement of science, 1950.

Dyfyniad MLA

Science: Nos 2871 - 2896. American association for the advancement of science, 1950.

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