3Geroge M Jacobs, Michael A Power, Loh Wan Lun. The Teacher's Sourcebook for Cooperative Learning : Practical Techniques, Basic Principles, and Frequently Asked Questions [M]. Corwin Press, 2001.
4D W Johnson, R T Johnson. Learning Together and Alone: Cooperative, Competitive, and Individualistic Learning (5^th, ed) [M]. Ally and Bacon, 1999.
