Dyfyniad APA

Black, S. (1996). Practical public relations/4e (4th ed.). Universal Book Stall.

Dyfyniad Arddull Chicago

Black, Sen. Practical Public Relations/4e. 4th ed. New Delhi: Universal Book Stall, 1996.

Dyfyniad MLA

Black, Sen. Practical Public Relations/4e. 4th ed. Universal Book Stall, 1996.

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