Não informado. (1960). Analyzer. Beckman Instruments, Scientific and Progress Instruments Division.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Analyzer. Fullerton, Calif: Beckman Instruments, Scientific and Progress Instruments Division, 1960.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Analyzer. Beckman Instruments, Scientific and Progress Instruments Division, 1960.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.