HIMMEL DAVID. (1992). WORKOUT C: LEARN C THROUGH EXERCISES. GALGOTIA PUBLICATIONS.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHIMMEL DAVID. WORKOUT C: LEARN C THROUGH EXERCISES. NEW DELHI: GALGOTIA PUBLICATIONS, 1992.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHIMMEL DAVID. WORKOUT C: LEARN C THROUGH EXERCISES. GALGOTIA PUBLICATIONS, 1992.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.