Danish national Library Authority & Bertelsen, E. W. (2001). Act regarding library services: [redaktion, Ellen Warrer Bertelsen]. Biblioteksstyrelsen.
Cita Chicago (17th ed.)Danish national Library Authority i Ellen Warrer Bertelsen. Act Regarding Library Services: [redaktion, Ellen Warrer Bertelsen]. K: Biblioteksstyrelsen, 2001.
Cita MLA (8th ed.)Danish national Library Authority i Ellen Warrer Bertelsen. Act Regarding Library Services: [redaktion, Ellen Warrer Bertelsen]. Biblioteksstyrelsen, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.