David, I. (1985). Keeping sample survey design and analysis simple. Asian Development Bank, Economics Office.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDavid, I.P. Keeping Sample Survey Design and Analysis Simple. Manila: Asian Development Bank, Economics Office, 1985.
एमएलए (9वां संस्करण) प्रशस्ति पत्रDavid, I.P. Keeping Sample Survey Design and Analysis Simple. Asian Development Bank, Economics Office, 1985.
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