Dyfyniad APA

Nelson, P. E. (2009). ISpeak. McGraw-Hill Higher Education.

Dyfyniad Arddull Chicago

Nelson, Paul E. ISpeak. McGraw-Hill Higher Education, 2009.

Dyfyniad MLA

Nelson, Paul E. ISpeak. McGraw-Hill Higher Education, 2009.

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