Não informado. (1961). Preservation News. National Trust for Historic Preservation.
Chicago-viite (17. p.)Não informado. Preservation News. Washington: National Trust for Historic Preservation, 1961.
MLA-viite (8. p.)Não informado. Preservation News. National Trust for Historic Preservation, 1961.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.