Não informado. (1929). Water works and sewerage. Gillette Publishing Company.
Chicago-viite (17. p.)Não informado. Water Works and Sewerage. Chicago, Ill: Gillette Publishing Company, 1929.
MLA-viite (8. p.)Não informado. Water Works and Sewerage. Gillette Publishing Company, 1929.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.