Gordon, Thomas. Leader effectiveness training, L.E.T. : the foundation for participative management and employee involvement / Thomas Gordon. - New York, N.Y. : G. P. Putnam's Sons, 1977. - 278 p. ; 22 cm. ISBN: 0399128883 LCCN: 83-011123 Subjects--Topical Terms: Leadership.Executive ability.Organizational behavior.