Não informado. (1929). Heating, Piping and Air Conditioning. Penton Publishing.
Lua i Stíl Chicago (17ú heag.)Não informado. Heating, Piping and Air Conditioning. Cleveland, Ohio: Penton Publishing, 1929.
Lua MLA (8ú heag.)Não informado. Heating, Piping and Air Conditioning. Penton Publishing, 1929.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.