Não informado. (1940). Sewage works engineering and municipal sanitation. Case Shepperd Mann.
Chicago-referens (17:e uppl.)Não informado. Sewage Works Engineering and Municipal Sanitation. New York: Case Shepperd Mann, 1940.
MLA-referens (8:e uppl.)Não informado. Sewage Works Engineering and Municipal Sanitation. Case Shepperd Mann, 1940.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.