International Progress Organization, Köchler, H., & Grabher, G. (1999). Civilizations: Conflict or dialogue. International Progress Organization.
Style de citation Chicago (17e éd.)International Progress Organization, Hans Köchler, et Gudrun Grabher. Civilizations: Conflict or Dialogue. Vienna, Austria: International Progress Organization, 1999.
Style de citation MLA (9e éd.)International Progress Organization, et al. Civilizations: Conflict or Dialogue. International Progress Organization, 1999.
Attention : ces citations peuvent ne pas être correctes à 100%.