Wallwork,Adrian. (1997). Discussions A-Z advanced: A resource book of speaking activities. US: Cambridge university press.
শিকাগো স্টাইলে সাইটেশনWallwork,Adrian. Discussions A-Z Advanced: A Resource Book of Speaking Activities. US: Cambridge university press, 1997.
এমএলএ সাইটেশনWallwork,Adrian. Discussions A-Z Advanced: A Resource Book of Speaking Activities. US: Cambridge university press, 1997.
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