Voigtsberger, S. (1973). Some Ideas Concerning Aims, Tasks and Principles of Organization of Spatial Planning. The Institute of National Planning.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रVoigtsberger, Siegfried. Some Ideas Concerning Aims, Tasks and Principles of Organization of Spatial Planning. Cairo: The Institute of National Planning, 1973.
एमएलए (9वां संस्करण) प्रशस्ति पत्रVoigtsberger, Siegfried. Some Ideas Concerning Aims, Tasks and Principles of Organization of Spatial Planning. The Institute of National Planning, 1973.
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