Não informado. (1969). IFLA Annual. International Federation of Library Associations and Institutions.
Style de citation Chicago (17e éd.)Não informado. IFLA Annual. Munich, Alemanha: International Federation of Library Associations and Institutions, 1969.
Style de citation MLA (8e éd.)Não informado. IFLA Annual. International Federation of Library Associations and Institutions, 1969.
Attention : ces citations peuvent ne pas être correctes à 100%.