Dyfyniad APA

British Library. Lending Division. BLL review. H.M. Stationery Off.

Dyfyniad Arddull Chicago

British Library. Lending Division. BLL Review. London: H.M. Stationery Off.

Dyfyniad MLA

British Library. Lending Division. BLL Review. H.M. Stationery Off.

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