International Progress Organization, Köchler, H., & Grabher, G. (1999). Civilizations: Conflict or dialogue. International Progress Organization.
芝加哥风格引文International Progress Organization, Hans Köchler, 与 Gudrun Grabher. Civilizations: Conflict or Dialogue. Vienna, Austria: International Progress Organization, 1999.
MLA引文International Progress Organization, et al. Civilizations: Conflict or Dialogue. International Progress Organization, 1999.
警告：这些引文格式不一定是100％准确.