Cita APA (7th ed.)

Wajnryb, R. (1995). Classroom observation tasks: A resource book for language (3a. ed.). Cambridge University.

Cita Chicago (17th ed.)

Wajnryb, Ruth. Classroom Observation Tasks: A Resource Book for Language. 3a. ed. Cambridge: Cambridge University, 1995.

Cita MLA (9th ed.)

Wajnryb, Ruth. Classroom Observation Tasks: A Resource Book for Language. 3a. ed. Cambridge University, 1995.