sack, k., & linsel, h. (1965). general organization of planning of industry. National Planning Institute.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रsack, kurt, और hermann linsel. General Organization of Planning of Industry. cairo: National Planning Institute, 1965.
एमएलए (9वां संस्करण) प्रशस्ति पत्रsack, kurt, और hermann linsel. General Organization of Planning of Industry. National Planning Institute, 1965.
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