Protzen, J., & Harris, D. J. (2010). The Universe of Design: Horst Rittel's Theories of Design and Planning. London: Routledge.
Chicago Style CitationProtzen, Jean-Pierre, and David J. Harris. The Universe of Design: Horst Rittel's Theories of Design and Planning. London: Routledge, 2010.
MLA CitationProtzen, Jean-Pierre, and David J. Harris. The Universe of Design: Horst Rittel's Theories of Design and Planning. London: Routledge, 2010.
Warning: These citations may not always be 100% accurate.