FERREAULT WILLAM D. (1990). LEARNING AID FOR USE WITH BASIC MARKETING (10TH.). IRWIN MCGRAW-HILL.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFERREAULT WILLAM D. LEARNING AID FOR USE WITH BASIC MARKETING. 10TH. HOMEWOOD: IRWIN MCGRAW-HILL, 1990.
एमएलए (9वां संस्करण) प्रशस्ति पत्रFERREAULT WILLAM D. LEARNING AID FOR USE WITH BASIC MARKETING. 10TH. IRWIN MCGRAW-HILL, 1990.
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