Citazione Stile APA (7a Edizione)

International Progress Organization, Köchler, H., & Grabher, G. (1999). Civilizations: Conflict or dialogue. International Progress Organization.

Citazione stile Chigago Style (17a edizione)

International Progress Organization, Hans Köchler, e Gudrun Grabher. Civilizations: Conflict or Dialogue. Vienna, Austria: International Progress Organization, 1999.

Citatione MLA (9a ed.)

International Progress Organization, et al. Civilizations: Conflict or Dialogue. International Progress Organization, 1999.