APA Style

Wajnryb, R. (2008). Classroom observation tasks: A resource book for language teachers and trainers (Cetakan 18). Cambridge: Cambridge University Press.

MLA Style

Wajnryb, Ruth. "Classroom observation tasks: A resource book for language teachers and trainers". Cetakan 18 Cambridge: Cambridge University Press, 2008. Buku SMP Athalia.