Richards, J. C., & Farrell, T. S. C. (2005). Professional development for language teachers: Strategies for teacher learning. Cambridge University Press.

Richards, Jack C., and Thomas S. C. Farrell. Professional Development for Language Teachers: Strategies for Teacher Learning. New York: Cambridge University Press, 2005.

Richards, Jack C., and Thomas S. C. Farrell. Professional Development for Language Teachers: Strategies for Teacher Learning. Cambridge University Press, 2005.