(1993). Kerr's cost data for landscape construction: Unit prices for site development (13th ed.). Van Nostrand Reinhold.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKerr's Cost Data for Landscape Construction: Unit Prices for Site Development. 13th ed. New York: Van Nostrand Reinhold, 1993.
एमएलए (9वां संस्करण) प्रशस्ति पत्रKerr's Cost Data for Landscape Construction: Unit Prices for Site Development. 13th ed. Van Nostrand Reinhold, 1993.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.