Bhandari, Medani. “The Development of the International Organization (IO) and Organizational Sociology Theories and Perspectives. Part 4 - Definitions and Types of IO”. Scientific Journal of Bielsko-Biala School of Finance and Law, vol. 23, no. 3, Oct. 2019, pp. 19-35, doi:10.5604/01.3001.0013.6527.