Dyfyniad APA

(1990). Proceedings Of The National Academy Of Sciences Of The United States Of America Number 7. The National Academy of Sciences of the.

Dyfyniad Arddull Chicago

Proceedings Of The National Academy Of Sciences Of The United States Of America Number 7. The National Academy of Sciences of the, 1990.

Dyfyniad MLA

Proceedings Of The National Academy Of Sciences Of The United States Of America Number 7. The National Academy of Sciences of the, 1990.

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