Nielsen, L. S. (1981). Standard Plumbing Engineering Design Louis S. Nielsen. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Nielsen, Louis S. Standard Plumbing Engineering Design Louis S. Nielsen. McGraw-Hill, 1981.
Lua MLA (8ú heag.)Nielsen, Louis S. Standard Plumbing Engineering Design Louis S. Nielsen. McGraw-Hill, 1981.
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