APA

Royal Institute of International Affairs, . (1920). The British yearbook of international law. Oxford: Oxford Univ. Press.

Chicago

Royal Institute of International Affairs, . 1920. The British yearbook of international law. Oxford: Oxford Univ. Press.

Harvard

Royal Institute of International Affairs, . (1920). The British yearbook of international law. Oxford: Oxford Univ. Press.

MLA

Royal Institute of International Affairs, . The British yearbook of international law. Oxford: Oxford Univ. Press. 1920.