Dyfyniad APA

Canfield, B. R. (1960). Public relations: Principles, cases, and problems (3rd ed.). Irwin.

Dyfyniad Arddull Chicago

Canfield, Bertrand R. Public Relations: Principles, Cases, and Problems. 3rd ed. Homewood, Ill: Irwin, 1960.

Dyfyniad MLA

Canfield, Bertrand R. Public Relations: Principles, Cases, and Problems. 3rd ed. Irwin, 1960.

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