Dyfyniad APA

Murphy, M., & Pamphilon, D. (2009). Preface to the third edition. John Wiley and Sons.

Dyfyniad Arddull Chicago

Murphy, M., and D. Pamphilon. Preface to the Third Edition. John Wiley and Sons, 2009.

Dyfyniad MLA

Murphy, M., and D. Pamphilon. Preface to the Third Edition. John Wiley and Sons, 2009.

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