(1991). IFLA General Conference, 1991. Division of Management and Technology: Section of Conservation; Section of Information Technology; Section of Library Buildings and Equipment; Section of Statistics; Management of Library Associations. Booklet 6.
Citazione stile Chigago Style (17a edizione)IFLA General Conference, 1991. Division of Management and Technology: Section of Conservation; Section of Information Technology; Section of Library Buildings and Equipment; Section of Statistics; Management of Library Associations. Booklet 6. 1991.
Citatione MLA (9a ed.)IFLA General Conference, 1991. Division of Management and Technology: Section of Conservation; Section of Information Technology; Section of Library Buildings and Equipment; Section of Statistics; Management of Library Associations. Booklet 6. 1991.