Não informado. (1929). Heating, Piping and Air Conditioning. Penton Publishing.
Chicago-Zitierstil (17. Ausg.)Não informado. Heating, Piping and Air Conditioning. Cleveland, Ohio: Penton Publishing, 1929.
MLA-Zitierstil (8. Ausg.)Não informado. Heating, Piping and Air Conditioning. Penton Publishing, 1929.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.