Dyfyniad APA

Stephenson, H. (1960). Handbook of public relations. McGraw-Hill.

Dyfyniad Arddull Chicago

Stephenson, Howard. Handbook of Public Relations. New York: McGraw-Hill, 1960.

Dyfyniad MLA

Stephenson, Howard. Handbook of Public Relations. McGraw-Hill, 1960.

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