National Learning Corporation. (2012). Heating and ventilation: Basic mini text : subject outline review. National Learning Corp..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNational Learning Corporation. Heating and Ventilation: Basic Mini Text : Subject Outline Review. Syosset, N.Y.: National Learning Corp., 2012.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNational Learning Corporation. Heating and Ventilation: Basic Mini Text : Subject Outline Review. National Learning Corp., 2012.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.