Forsyth, P. (2004). Marketing and selling professional services/3e (3rd ed.). Kogan page.
शिकागो स्टाइल उद्धरणForsyth, Patrick. Marketing and Selling Professional Services/3e. 3rd ed. New Delhi: Kogan page, 2004.
एमएलए उद्धरणForsyth, Patrick. Marketing and Selling Professional Services/3e. 3rd ed. Kogan page, 2004.
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