International Congress on National Bibliographies Paryż, International Federation of Library Associations, UNESCO, & UNESCO. (1977). The national bibliography: Present rôle and future developments : International Congress on National Bibliographies, Paris 12-15 September 1977. Unesco.
Cita Chicago Style (17a ed.)International Congress on National Bibliographies Paryż, International Federation of Library Associations, UNESCO, y UNESCO. The National Bibliography: Present Rôle and Future Developments : International Congress on National Bibliographies, Paris 12-15 September 1977. Paris: Unesco, 1977.
Cita MLA (9a ed.)International Congress on National Bibliographies Paryż, et al. The National Bibliography: Present Rôle and Future Developments : International Congress on National Bibliographies, Paris 12-15 September 1977. Unesco, 1977.