Covey, Stephen R. The 7 habits of highly effective people : powerful lessons in personal change / Stephen R. Covey - New York : Fireside Press, 1989 - 358 p. ; 22 cm. ISBN: 671708635 9780671708634 Subjects--Topical Terms: Missiology - Periodicals. LC Class. No.: BF637.S8 / .C68 1989