Villers, R. (1964). Research and development: Planning and control. Financial Executives Institute.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रVillers, Raymond. Research and Development: Planning and Control. [New York: Financial Executives Institute, 1964.
एमएलए (9वां संस्करण) प्रशस्ति पत्रVillers, Raymond. Research and Development: Planning and Control. Financial Executives Institute, 1964.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.