PUFFETT, R. (1990). Plumbing services volume 2, waste disposal, roof plumbing 2nd ed. McGraw Hill.
Chicago Style (17. basım) AtıfPUFFETT, RJ. Plumbing Services Volume 2, Waste Disposal, Roof Plumbing 2nd Ed. McGraw Hill, 1990.
MLA (8th ed.) AtıfPUFFETT, RJ. Plumbing Services Volume 2, Waste Disposal, Roof Plumbing 2nd Ed. McGraw Hill, 1990.
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