Ryans, J. K. (1990). Marketing Strategies for the New Europe: A North American perspective on 1992. USA: American Marketing Association.
शिकागो स्टाइल उद्धरणRyans, John K. Marketing Strategies for the New Europe: A North American Perspective On 1992. USA: American Marketing Association, 1990.
एमएलए उद्धरणRyans, John K. Marketing Strategies for the New Europe: A North American Perspective On 1992. USA: American Marketing Association, 1990.
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