Braun, E. E. (1969). Bruce M. Russett. International regions and the international system: A study in political ecology. Chicago : Rand Mcnally, 1967. El Colegio de México A.C.
Cita Chicago Style (17a ed.)Braun, Elisabeth Esser. Bruce M. Russett. International Regions and the International System: A Study in Political Ecology. Chicago : Rand Mcnally, 1967. El Colegio de México A.C, 1969.
Cita MLA (9a ed.)Braun, Elisabeth Esser. Bruce M. Russett. International Regions and the International System: A Study in Political Ecology. Chicago : Rand Mcnally, 1967. El Colegio de México A.C, 1969.
警告：這些引文格式不一定是100％准確.