De Angelis d'Ossat, G. (1972). Guide to the methodical study of monuments and causes of their deterioration: Guida allo studio metodico dei monumenti e delle loro cause di deterioramento. International Centre for the Study of Preservation and Restoration of Cultural Property.
Chicago Style (17th ed.) CitationDe Angelis d'Ossat, Guglielmo. Guide to the Methodical Study of Monuments and Causes of Their Deterioration: Guida Allo Studio Metodico Dei Monumenti E Delle Loro Cause Di Deterioramento. Rome: International Centre for the Study of Preservation and Restoration of Cultural Property, 1972.
MLA (9th ed.) CitationDe Angelis d'Ossat, Guglielmo. Guide to the Methodical Study of Monuments and Causes of Their Deterioration: Guida Allo Studio Metodico Dei Monumenti E Delle Loro Cause Di Deterioramento. International Centre for the Study of Preservation and Restoration of Cultural Property, 1972.