Dyfyniad APA

Journal of Efficiency & Responsibility in Education & Science.

Dyfyniad Arddull Chicago

Journal of Efficiency & Responsibility in Education & Science.

Dyfyniad MLA

Journal of Efficiency & Responsibility in Education & Science.

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