Não informado. (1929). Heating and Ventilating. National Trade Journals.
Cita Chicago Style (17a ed.)Não informado. Heating and Ventilating. New York: National Trade Journals, 1929.
Cita MLA (8a ed.)Não informado. Heating and Ventilating. National Trade Journals, 1929.
Precaución: Estas citas no son 100% exactas.