Dyfyniad APA

(2004). Public relations: The Practice and the Profession. New York: McGraw-Hill.

Dyfyniad Arddull Chicago

Public Relations: The Practice and the Profession. New York: McGraw-Hill, 2004.

Dyfyniad MLA

Public Relations: The Practice and the Profession. New York: McGraw-Hill, 2004.

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