Gaya APA

Barkley, E, F. et al (2005). Collaborative Learning Techniques: A Handbook for College Faculty (ed. 1). San Fransisco: Jossey-Bass.

Gaya MLA

Barkley, Elizabeth, F.. et al. "Collaborative Learning Techniques: A Handbook for College Faculty". ed. 1 San Fransisco: Jossey-Bass, 2005. Text.