Nechamkin, H. 1. [. o. c. (1962). Laboratory problems in general chemistry (3d ed.). Crowell.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNechamkin, Howard 1918- [from old catalog]. Laboratory Problems in General Chemistry. 3d ed. New York: Crowell, 1962.
एमएलए (9वां संस्करण) प्रशस्ति पत्रNechamkin, Howard 1918- [from old catalog]. Laboratory Problems in General Chemistry. 3d ed. Crowell, 1962.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.