Messmer, D., & Landert, M. (2004). Ernst Thoma: Landscapes.
Lua i Stíl Chicago (17ú heag.)Messmer, Dorothee, agus Markus Landert. Ernst Thoma: Landscapes. Warth, 2004.
Lua MLA (8ú heag.)Messmer, Dorothee, agus Markus Landert. Ernst Thoma: Landscapes. 2004.
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