Knowles, M., Holton III, E., & Swanson, R. (1998). The Adult Learner The Definitive Classic in Adult Education and Human Resource Development. San Diego.
The late Malcolm Knowles' cornerstone work on adult learning theory and practices is Gulf Publishing Company, 1998 - Business & Economics - 310 pages.
The Adult Learner: The definitive classic in adult education and human resource development Paperback – January 4, 2015. These were the questions at the heart of Malcolm Knowles’s pioneering theory of andragogy which transformed education theory in the 1970s. The Adult Learner.