Supplement to handbook of international organisations :
(associations, bureaux, committees, etc.)
APA Citation
League of Nations. (1931). Supplement to handbook of international organisations: (associations, bureaux, committees, etc.). Geneva: The League.
MLA Citation
League of Nations. Supplement to Handbook of International Organisations: (associations, Bureaux, Committees, Etc.). Geneva: The League, 1931.
Warning: These citations may not always be complete (especially for serials).