Dyfyniad APA
Olesen, J. (2006). The headaches (Third edition.). Lippincott Williams & Wilkins.
Dyfyniad Arddull Chicago
Olesen, Jes. The Headaches. Third edition. Philadelphia: Lippincott Williams & Wilkins, 2006.
Dyfyniad MLA
Olesen, Jes. The Headaches. Third edition. Lippincott Williams & Wilkins, 2006.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.