(2003). Maintenance and repair of cleaned stone buildings. Historic Scotland, Technical Conservation, Research and Education Group.
Chicago-Zitierstil (17. Ausg.)Maintenance and Repair of Cleaned Stone Buildings. Edinburgh: Historic Scotland, Technical Conservation, Research and Education Group, 2003.
MLA-Zitierstil (9. Ausg.)Maintenance and Repair of Cleaned Stone Buildings. Historic Scotland, Technical Conservation, Research and Education Group, 2003.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.