Barkley, E. F., Major, C. H., & Cross, K. P. (2014). Collaborative learning techniques: A handbook for college faculty (Second edition.). John Wiley.

Barkley, Elizabeth F., Claire Howell Major, and K. Patricia Cross. Collaborative Learning Techniques: A Handbook for College Faculty. Second edition. USA: John Wiley, 2014.

Barkley, Elizabeth F., et al. Collaborative Learning Techniques: A Handbook for College Faculty. Second edition. John Wiley, 2014.