Não informado. (1929). Heating, Piping and Air Conditioning. Penton Publishing.
Chicago-referens (17:e uppl.)Não informado. Heating, Piping and Air Conditioning. Cleveland, Ohio: Penton Publishing, 1929.
MLA-referens (8:e uppl.)Não informado. Heating, Piping and Air Conditioning. Penton Publishing, 1929.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.