Não informado. (2000). Library conservation news. British Library, National Preservation Office.
Chicago-viite (17. p.)Não informado. Library Conservation News. London: British Library, National Preservation Office, 2000.
MLA-viite (8. p.)Não informado. Library Conservation News. British Library, National Preservation Office, 2000.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.