Não informado. (1929). Heating, Piping and Air Conditioning. Penton Publishing.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Heating, Piping and Air Conditioning. Cleveland, Ohio: Penton Publishing, 1929.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Heating, Piping and Air Conditioning. Penton Publishing, 1929.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.