Das, P. L. Advanced social research methodology (4th.). Shree Jaynarayan.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDas, Prabhakar Lal. Advanced Social Research Methodology. 4th. Rajbiraj: Shree Jaynarayan.
एमएलए (8वां संस्करण) प्रशस्ति पत्रDas, Prabhakar Lal. Advanced Social Research Methodology. 4th. Shree Jaynarayan.
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