Gräfnitz, C. (2004). The Doll Heads of KPM the Royal Porcelain Maniufacturer, Berlin 1840-1852. Doll News.
Lua i Stíl Chicago (17ú heag.)Gräfnitz, Christiane. "The Doll Heads of KPM the Royal Porcelain Maniufacturer, Berlin 1840-1852." Doll News 2004.
Lua MLA (8ú heag.)Gräfnitz, Christiane. "The Doll Heads of KPM the Royal Porcelain Maniufacturer, Berlin 1840-1852." Doll News, 2004.
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