Não informado. (1969). IFLA Annual. International Federation of Library Associations and Institutions.
Chicago-Zitierstil (17. Ausg.)Não informado. IFLA Annual. Munich, Alemanha: International Federation of Library Associations and Institutions, 1969.
MLA-Zitierstil (8. Ausg.)Não informado. IFLA Annual. International Federation of Library Associations and Institutions, 1969.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.