Cratty, B. J. (1971). Active learning: Games to enhance academic abilities. Prentice-Hall.
Dyfyniad Arddull ChicagoCratty, Bryant J. Active Learning: Games to Enhance Academic Abilities. Englewood Cliffs, N. J: Prentice-Hall, 1971.
Dyfyniad MLACratty, Bryant J. Active Learning: Games to Enhance Academic Abilities. Prentice-Hall, 1971.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.