Siemen, W. (2007). Johanna Hitzler ; Was mir Spaß macht. Neue Keramik.
Citazione stile Chigago Style (17a edizione)Siemen, Wilhelm. "Johanna Hitzler ; Was Mir Spaß Macht." Neue Keramik 2007.
Citatione MLA (8a ed.)Siemen, Wilhelm. "Johanna Hitzler ; Was Mir Spaß Macht." Neue Keramik, 2007.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.