National Trust for Historic Preservation in the United States & Zagars, J. (1997). Preservation Yellow pages: The complete information source for homeowners, communities and professionals (Rev. ed.). Wiley ; Preservation Press.
Lua i Stíl Chicago (17ú heag.)National Trust for Historic Preservation in the United States agus Julie Zagars. Preservation Yellow Pages: The Complete Information Source for Homeowners, Communities and Professionals. Rev. ed. New York : [Washington, D.C.]: Wiley ; Preservation Press, 1997.
Lua MLA (8ú heag.)National Trust for Historic Preservation in the United States agus Julie Zagars. Preservation Yellow Pages: The Complete Information Source for Homeowners, Communities and Professionals. Rev. ed. Wiley ; Preservation Press, 1997.