Kolb, R. W. (1991). Understanding future markets (3rd ed.). Prentice-Hall of India.
शिकागो स्टाइल उद्धरणKolb, Robert W. Understanding Future Markets. 3rd ed. New Delhi: Prentice-Hall of India, 1991.
एमएलए उद्धरणKolb, Robert W. Understanding Future Markets. 3rd ed. Prentice-Hall of India, 1991.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.