Não informado. (1958). Air Conditioning, Heating and Refrigeration News. Business News Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Air Conditioning, Heating and Refrigeration News. Troy, Mich: Business News Publishing, 1958.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Air Conditioning, Heating and Refrigeration News. Business News Publishing, 1958.
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