National Council for Preservation Education (U.S.). Preservation education & research. National Council for Preservation Education.
Chicago-Zitierstil (17. Ausg.)National Council for Preservation Education (U.S.). Preservation Education & Research. College Station, TX: National Council for Preservation Education.
MLA-Zitierstil (9. Ausg.)National Council for Preservation Education (U.S.). Preservation Education & Research. National Council for Preservation Education.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.