APA (7th ed.) Citation
Tough, A. M. (1979). The adult's learning projects: A fresh approach to theory and practice in adult learning (2nd ed.). Learning Concepts.
Chicago Style (17th ed.) Citation
Tough, Allen M. The Adult's Learning Projects: A Fresh Approach to Theory and Practice in Adult Learning. 2nd ed. Austin, Tex.: Learning Concepts, 1979.
MLA (9th ed.) Citation
Tough, Allen M. The Adult's Learning Projects: A Fresh Approach to Theory and Practice in Adult Learning. 2nd ed. Learning Concepts, 1979.
Warning: These citations may not always be 100% accurate.