Cratty, B. J. (1971). Active learning: Games to enhance academic abilities. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Cratty, Bryant J. Active Learning: Games to Enhance Academic Abilities. Englewood Cliffs, N. J: Prentice-Hall, 1971.
Lua MLA (9ú heag.)Cratty, Bryant J. Active Learning: Games to Enhance Academic Abilities. Prentice-Hall, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.