Cratty, B. J. (1971). Active learning: Games to enhance academic abilities. Prentice-Hall.
Chicago-referens (17:e uppl.)Cratty, Bryant J. Active Learning: Games to Enhance Academic Abilities. Englewood Cliffs, N. J: Prentice-Hall, 1971.
MLA-referens (9:e uppl.)Cratty, Bryant J. Active Learning: Games to Enhance Academic Abilities. Prentice-Hall, 1971.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.