Não informado. (1981). Refrigeration, Air Conditioning and Heat Recovery. Maclaren Publishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Refrigeration, Air Conditioning and Heat Recovery. Croydon, Inglaterra: Maclaren Publishers, 1981.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Refrigeration, Air Conditioning and Heat Recovery. Maclaren Publishers, 1981.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.