APA
Black Cyril E, Folk Richard A, . (1972). The future of the international legal order.Vol.4 : The structure of the international environment. New Jersy: Princeton University Press.
Chicago
Black Cyril E, Folk Richard A, . 1972. The future of the international legal order.Vol.4 : The structure of the international environment. New Jersy: Princeton University Press.
Harvard
Black Cyril E, Folk Richard A, . (1972). The future of the international legal order.Vol.4 : The structure of the international environment. New Jersy: Princeton University Press.
MLA
Black Cyril E, Folk Richard A, . The future of the international legal order.Vol.4 : The structure of the international environment. New Jersy: Princeton University Press. 1972.