Spiegel, H. B. C. (1968). Citizen participation in urban development. Center for Community Affairs, NTL Institute for Applied Behavioral Science.
Tohutoru Kātū Chicago (17th ed.)Spiegel, Hans B. C. Citizen Participation in Urban Development. [Washington]: Center for Community Affairs, NTL Institute for Applied Behavioral Science, 1968.
Tohutoro MLA (9th ed.)Spiegel, Hans B. C. Citizen Participation in Urban Development. Center for Community Affairs, NTL Institute for Applied Behavioral Science, 1968.
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