Harriet, R., M., M., G.(2016).Material culture in modern diplomacy from the 15th to the 20th century .Berlin, Germany:De Gruyter Oldenbourg.
Gaya MLA
Rudolph, Harriet., Metzig, Gregor, M.."Material culture in modern diplomacy from the 15th to the 20th century".Berlin, Germany:De Gruyter Oldenbourg,2016.Electronic Resource.