Dyfyniad APA

Jefkins, F., & Yadin, D. (1998). Public relations (5th ed.). Prentice Hall.

Dyfyniad Arddull Chicago

Jefkins, Frank, and Daniel Yadin. Public Relations. 5th ed. London: Prentice Hall, 1998.

Dyfyniad MLA

Jefkins, Frank, and Daniel Yadin. Public Relations. 5th ed. Prentice Hall, 1998.

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