International Progress Organization, Köchler, H., & Grabher, G. (1999). Civilizations: Conflict or dialogue. International Progress Organization.
Chicagoスタイル(17版)引用形式International Progress Organization, Hans Köchler, , Gudrun Grabher. Civilizations: Conflict or Dialogue. Vienna, Austria: International Progress Organization, 1999.
MLA(9版)引用形式International Progress Organization, et al. Civilizations: Conflict or Dialogue. International Progress Organization, 1999.
警告: この引用は必ずしも正確ではありません.