Frieling, R. (2008). The art of participation: 1950 to now. Thames and Hudson.
Chicago-Zitierstil (17. Ausg.)Frieling, Rudolf. The Art of Participation: 1950 to Now. New York: Thames and Hudson, 2008.
MLA-Zitierstil (8. Ausg.)Frieling, Rudolf. The Art of Participation: 1950 to Now. Thames and Hudson, 2008.
警告：這些引文格式不一定是100％准確.