Heller, R. (1980). The business of winning. London: Sidgwick and Jackson.
शिकागो स्टाइल उद्धरणHeller, Robert. The Business of Winning. London: Sidgwick and Jackson, 1980.
एमएलए उद्धरणHeller, Robert. The Business of Winning. London: Sidgwick and Jackson, 1980.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.