Ricke, H. (2008). Please Pet Me!?: Marta Klonowska's Extraordinary Qorld of Animals. Neues Glas.
Lua i Stíl Chicago (17ú heag.)Ricke, Helmut. "Please Pet Me!?: Marta Klonowska's Extraordinary Qorld of Animals." Neues Glas 2008.
Lua MLA (8ú heag.)Ricke, Helmut. "Please Pet Me!?: Marta Klonowska's Extraordinary Qorld of Animals." Neues Glas, 2008.
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