Dyfyniad APA

(1969). PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCE OF THE UNITED STATES OF AMERICA ( J ). THE NATIONAL ACADEMY OF SCIENCE.

Dyfyniad Arddull Chicago

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCE OF THE UNITED STATES OF AMERICA ( J ). USA: THE NATIONAL ACADEMY OF SCIENCE, 1969.

Dyfyniad MLA

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCE OF THE UNITED STATES OF AMERICA ( J ). THE NATIONAL ACADEMY OF SCIENCE, 1969.

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