The adult learner :
Knowles, Malcolm S. 1913-1997,
The adult learner : the definitive classic in adult education and human resource development. Malcolm S. Knowles, Elwood F. Holton III, Richard A. Swanson. - Eighth edition / Malcolm S. Knowles, Elwood F. Holton III, Richard A. Swanson. - London : Routledge, 2015. - 1 volume : illustrations (black and white) ; 24 cm