Holtje, H. F. (1981). Schaum's outline of theory and problems of marketing. Mc graw hill book company.
शिकागो स्टाइल उद्धरणHoltje, Herbert F. Schaum's Outline of Theory and Problems of Marketing. New York: Mc graw hill book company, 1981.
एमएलए उद्धरणHoltje, Herbert F. Schaum's Outline of Theory and Problems of Marketing. Mc graw hill book company, 1981.
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