Dyfyniad APA

Fry, R. (2003). Great big book of personal productivity. Viva Books.

Dyfyniad Arddull Chicago

Fry, Ron. Great Big Book of Personal Productivity. New Delhi: Viva Books, 2003.

Dyfyniad MLA

Fry, Ron. Great Big Book of Personal Productivity. Viva Books, 2003.

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