APA (7 ম সংস্করণ) উদ্ধৃতি

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

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

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

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

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