Цитирование APA (7-е изд.)
Tough, A. M. (1979). The adult's learning projects: A fresh approach to theory and practice in adult learning (2nd ed.). Learning Concepts.
Цитирование в стиле Чикаго (17-е изд.)
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.
Цитирование MLA (9-е изд.)
Tough, Allen M. The Adult's Learning Projects: A Fresh Approach to Theory and Practice in Adult Learning. 2nd ed. Learning Concepts, 1979.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.