Hansen, B. (1972). Long and short-term planning in underdeveloped countries. North-Holland Publishing Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHansen, Bent. Long and Short-term Planning in Underdeveloped Countries. Amsterdam: North-Holland Publishing Company, 1972.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHansen, Bent. Long and Short-term Planning in Underdeveloped Countries. North-Holland Publishing Company, 1972.
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