Union of International Associations. Yearbook of International Organizations 1981 (19.). Union of International Associations.
Cita Chicago Style (17a ed.)Union of International Associations. Yearbook of International Organizations 1981. 19. Bruselas: Union of International Associations.
Cita MLA (9a ed.)Union of International Associations. Yearbook of International Organizations 1981. 19. Union of International Associations.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.