Dyfyniad APA

Pennsylvania Academy of Science. Proceedings of the Pennsylvania Academy of Science. Pennsylvania Academy of Science.

Dyfyniad Arddull Chicago

Pennsylvania Academy of Science. Proceedings of the Pennsylvania Academy of Science. [Harrisburg]: Pennsylvania Academy of Science.

Dyfyniad MLA

Pennsylvania Academy of Science. Proceedings of the Pennsylvania Academy of Science. Pennsylvania Academy of Science.

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