Não informado. (1927). Heating and ventilating engineer and journal of air conditionin. Technitrade Journals.
Čikaški stil citiranja (17. izdanje)Não informado. Heating and Ventilating Engineer and Journal of Air Conditionin. London: Technitrade Journals, 1927.
MLA način citiranja (8. izdanje)Não informado. Heating and Ventilating Engineer and Journal of Air Conditionin. Technitrade Journals, 1927.
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