Liebowitz, D. G. (1990). Practical vocabulary builder Blackline masters. USA: National textbook Company.
शिकागो स्टाइल उद्धरणLiebowitz, Dorothy Gabel. Practical Vocabulary Builder Blackline Masters. USA: National textbook Company, 1990.
एमएलए उद्धरणLiebowitz, Dorothy Gabel. Practical Vocabulary Builder Blackline Masters. USA: National textbook Company, 1990.
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