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