CROCKETT, J. U. (1979). Lawns And Ground Covers James Underwood Crockett. Time-Life Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCROCKETT, James Underwood. Lawns And Ground Covers James Underwood Crockett. Time-Life Books, 1979.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCROCKETT, James Underwood. Lawns And Ground Covers James Underwood Crockett. Time-Life Books, 1979.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.