Dyfyniad APA

Essex Institute. Proceedings of the Essex Institute. Essex Institute Press.

Dyfyniad Arddull Chicago

Essex Institute. Proceedings of the Essex Institute. Salem: Essex Institute Press.

Dyfyniad MLA

Essex Institute. Proceedings of the Essex Institute. Essex Institute Press.

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