Babbitt, H. E., & Baumann, E. R. (1958). Sewerage and sewage treatment (8th ed.). Wiley.
Lua i Stíl Chicago (17ú heag.)Babbitt, Harold E., agus Edward Robert Baumann. Sewerage and Sewage Treatment. 8th ed. New York: Wiley, 1958.
Lua MLA (9ú heag.)Babbitt, Harold E., agus Edward Robert Baumann. Sewerage and Sewage Treatment. 8th ed. Wiley, 1958.
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