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Mason, R.
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De La Torre, M.
(Eds) (2000), Values and Heritage Conservation, Getty Conservation Institute, Los Angeles, CA.
2. Babbie, E.R.
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3. English Heritage
(2008), Conservation Principles: Policies and Guidelines, English Heritage, London.
4. European Committee for Standardisation
(2006), EN 15221-1-1:2006: Facilities Management-Part 1: Terms and Definitions, European Committee for Standardization, Brussels.
5. Feilden, B.
(2000), Conservation of Historic Buildings, Architectural Press, Oxford.