Dyfyniad APA

. (2016). Office for Learning and Teaching. Office for Learning and Teaching.

Dyfyniad Arddull Chicago

Office for Learning and Teaching. Office for Learning and Teaching, 2016.

Dyfyniad MLA

Office for Learning and Teaching. Office for Learning and Teaching, 2016.

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