Cragan, John F. Understanding communication theory : the communicative forces for human action / John F. Cragan, Donald C. Shields - Boston : Allyn and Bacon, 1998 - x, 422 p. : ill. ; 25 cm. Includes bibliographical references (p. 334-398) and indexes ISBN: 0205195873 RM385.72 Subjects--Topical Terms: Communication--Philosophy