Dyfyniad APA

Hagen, S. A. (1988). Sound Advice: A Basis for Listening. Englewood Cliffs, New Jersey: Prentice-Hall.

Dyfyniad Arddull Chicago

Hagen, Stacy A. Sound Advice: A Basis for Listening. Englewood Cliffs, New Jersey: Prentice-Hall, 1988.

Dyfyniad MLA

Hagen, Stacy A. Sound Advice: A Basis for Listening. Englewood Cliffs, New Jersey: Prentice-Hall, 1988.

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