Wallwork, A. (1997). Discussions A - Z: A resource book for speaking activities. Cambridge, UK: Cambridge University Press.
शिकागो स्टाइल उद्धरणWallwork, Adrian. Discussions A - Z: A Resource Book for Speaking Activities. Cambridge, UK: Cambridge University Press, 1997.
एमएलए उद्धरणWallwork, Adrian. Discussions A - Z: A Resource Book for Speaking Activities. Cambridge, UK: Cambridge University Press, 1997.
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