PUFFETT, R. (1990). Plumbing Services Waste Disposal, Roof Plumbing Rj Puffett, Lj. Hossack. McGraw-Hill.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPUFFETT, RJ. Plumbing Services Waste Disposal, Roof Plumbing Rj Puffett, Lj. Hossack. McGraw-Hill, 1990.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPUFFETT, RJ. Plumbing Services Waste Disposal, Roof Plumbing Rj Puffett, Lj. Hossack. McGraw-Hill, 1990.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.