Unesco, World Heritage Centre, International Centre for the Study of the Preservation and the Restoration of Cultural Property, International Council on Monuments and Sites, International Union for Conservation of Nature and Natural Resources, & Marshall, D. Preparing World Heritage nominations: World heritage resource manual (Second edition.).
Cita Chicago (17th ed.)Unesco, World Heritage Centre, International Centre for the Study of the Preservation and the Restoration of Cultural Property, International Council on Monuments and Sites, International Union for Conservation of Nature and Natural Resources, i Duncan Marshall. Preparing World Heritage Nominations: World Heritage Resource Manual. Second edition.
Cita MLA (9th ed.)Unesco, et al. Preparing World Heritage Nominations: World Heritage Resource Manual. Second edition.