Não informado. (1969). Yearbook of international congress proceedings. Union of International Associations.
Style de citation Chicago (17e éd.)Não informado. Yearbook of International Congress Proceedings. Brussels: Union of International Associations, 1969.
Style de citation MLA (8e éd.)Não informado. Yearbook of International Congress Proceedings. Union of International Associations, 1969.
Attention : ces citations peuvent ne pas être correctes à 100%.