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.
Chicago-referens (17:e uppl.)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.
MLA-referens (8:e uppl.)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.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.