Não informado. (1927). Heating and ventilating engineer and journal of air conditionin. Technitrade Journals.
Chicago-referens (17:e uppl.)Não informado. Heating and Ventilating Engineer and Journal of Air Conditionin. London: Technitrade Journals, 1927.
MLA-referens (8:e uppl.)Não informado. Heating and Ventilating Engineer and Journal of Air Conditionin. Technitrade Journals, 1927.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.