Arnheim, R. (1999). Thiel, Philip. People, Paths, and Purposes: Notations for a Participatory Envirotecture: Reviewed by Rudolf Arnheim. The Journal of Aesthetics and Art Criticism.
Lua i Stíl Chicago (17ú heag.)Arnheim, Rudolf. "Thiel, Philip. People, Paths, and Purposes: Notations for a Participatory Envirotecture: Reviewed by Rudolf Arnheim." The Journal of Aesthetics and Art Criticism 1999.
Lua MLA (8ú heag.)Arnheim, Rudolf. "Thiel, Philip. People, Paths, and Purposes: Notations for a Participatory Envirotecture: Reviewed by Rudolf Arnheim." The Journal of Aesthetics and Art Criticism, 1999.
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