Voigtsberger, S. (1973). Some Ideas Concerning Aims, Tasks and Principles of Organization of Spatial Planning. The Institute of National Planning.
Παραπομπή σε μορφή Chicago (17η εκδ.)Voigtsberger, Siegfried. Some Ideas Concerning Aims, Tasks and Principles of Organization of Spatial Planning. Cairo: The Institute of National Planning, 1973.
Παραπομπή σε μορφή MLA (9th εκδ.)Voigtsberger, Siegfried. Some Ideas Concerning Aims, Tasks and Principles of Organization of Spatial Planning. The Institute of National Planning, 1973.
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