GELLHORN, E. (1987). Regulated Industries Ernest Gellhorn, Richard J. Pierce. West Publishing Compan.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGELLHORN, Ernest. Regulated Industries Ernest Gellhorn, Richard J. Pierce. West Publishing Compan, 1987.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGELLHORN, Ernest. Regulated Industries Ernest Gellhorn, Richard J. Pierce. West Publishing Compan, 1987.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.