Maxwell, John C. The 21 most powerful minutes in a leader's day : revitalize your spirit and empower your leadership / Twenty most powerful minutes in a leader's day John C. Maxwell - Nashville, Tenn : Thomas Nelson, c2007 - xii, 371 p. ; 22 cm. Includes bibliographical references ISBN: 0785289275 9780785289272 Subjects--Topical Terms: LeadershipProfessional ethics