Ruth Wajryb. (1992). Classroom Observation tasks: A resource book for language teachers and trainers. Cambridge, UK: Cambridge Univ. Press.
शिकागो स्टाइल उद्धरणRuth Wajryb. Classroom Observation Tasks: A Resource Book for Language Teachers and Trainers. Cambridge, UK: Cambridge Univ. Press, 1992.
एमएलए उद्धरणRuth Wajryb. Classroom Observation Tasks: A Resource Book for Language Teachers and Trainers. Cambridge, UK: Cambridge Univ. Press, 1992.
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