Dyfyniad APA

American Association for the Advancement of Science. Science. [publisher not identified].

Dyfyniad Arddull Chicago

American Association for the Advancement of Science. Science. New York, N.Y.: [publisher not identified].

Dyfyniad MLA

American Association for the Advancement of Science. Science. [publisher not identified].

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