APA Style

Richards, J, C., Farrell, T, S. (2008). Profesional development for language teachers: strategis for teacher learning . New York: Cambridge University Press.

MLA Style

Richards, Jack, C.., Farrell, Thomas, S.C.. "Profesional development for language teachers: strategis for teacher learning". New York: Cambridge University Press, 2008. Buku SMP Athalia.