APA (7th ed.) Citation

Knowles, M. S., Holton, E. F., Swanson, R. A., & Robinson, P. A. (2020). The adult learner: The definitive classic in adult education and human resource development (Ninth edition.). Routledge.

Chicago Style (17th ed.) Citation

Knowles, Malcolm S., Elwood F. Holton, Richard A. Swanson, and Petra A. Robinson. The Adult Learner: The Definitive Classic in Adult Education and Human Resource Development. Ninth edition. London ; New York: Routledge, 2020.

MLA (9th ed.) Citation

Knowles, Malcolm S., et al. The Adult Learner: The Definitive Classic in Adult Education and Human Resource Development. Ninth edition. Routledge, 2020.