Cutlip, Scott M. Effective public relations / Scott M. Cutlip, Allen H. Center and Glen M. Broom. - 6th ed. - London : Prentice-Hall, c1985. - xviii, 670 p. : ill. ; 25 cm. Includes index. Includes bibliographical references. ISBN: 0132450933 (pbk.) Subjects--Topical Terms: Public relations.