Kumar, P. (2004). Information Sources and services (therory) and practics Vi- Vii. BRPC and LTD.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKumar, PSG. Information Sources and Services (therory) and Practics Vi- Vii. Delhi: BRPC and LTD, 2004.
एमएलए (9वां संस्करण) प्रशस्ति पत्रKumar, PSG. Information Sources and Services (therory) and Practics Vi- Vii. BRPC and LTD, 2004.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.