Donald Flynn. (1998). Information systems requirements (Determination and analysis). London: McGraw-Hill.
शिकागो स्टाइल उद्धरणDonald Flynn. Information Systems Requirements (Determination and Analysis). London: McGraw-Hill, 1998.
एमएलए उद्धरणDonald Flynn. Information Systems Requirements (Determination and Analysis). London: McGraw-Hill, 1998.
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