Stecker, R. Definition of art: Robert Stecker. The Oxford handbook of aesthetics.(2003).
Lua i Stíl Chicago (17ú heag.)Stecker, Robert. "Definition of Art: Robert Stecker." The Oxford Handbook of Aesthetics.(2003) .
Lua MLA (8ú heag.)Stecker, Robert. "Definition of Art: Robert Stecker." The Oxford Handbook of Aesthetics.(2003), .
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