Cita APA (7th ed.)

Wajnryb, R. (1992). Classroom observation tasks: A resource book for language teachers and trainers. Cambridge University Press.

Cita Chicago (17th ed.)

Wajnryb, Ruth. Classroom Observation Tasks: A Resource Book for Language Teachers and Trainers. Cambridge: Cambridge University Press, 1992.

Cita MLA (9th ed.)

Wajnryb, Ruth. Classroom Observation Tasks: A Resource Book for Language Teachers and Trainers. Cambridge University Press, 1992.