Não informado. (1929). Heating and Ventilating. National Trade Journals.
Lua i Stíl Chicago (17ú heag.)Não informado. Heating and Ventilating. New York: National Trade Journals, 1929.
Lua MLA (8ú heag.)Não informado. Heating and Ventilating. National Trade Journals, 1929.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.