Wilder, Lilyan. Professionally speaking : getting ahead in business and life through effective communicating / by Lilyan Wilder ; foreword by John Naisbitt. - New York : Simon and Schuster, c1986. - 319 p. : ill. ; 25 cm. Includes index. ISBN: 0671540785 LCCN: 85030454 Subjects--Topical Terms: Public speaking.Voice culture. LC Class. No.: PN4121 / .W387 1986 Dewey Class. No.: 808.5/1