(1983). Economic impact. Research: Path to technological progress. Washington.
शिकागो स्टाइल उद्धरणEconomic Impact. Research: Path to Technological Progress. Washington, 1983.
एमएलए उद्धरणEconomic Impact. Research: Path to Technological Progress. Washington, 1983.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.