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Lua i Stíl Chicago (17ú heag.)Paetzold, Heinz. "How to Bridge the Gap Between the Philosophy of Art and the Aesthetics of Nature: A Systematic Approach / Heinz Paetzold." Issues in Contemporary Culture and Aesthetics 1997.
Lua MLA (8ú heag.)Paetzold, Heinz. "How to Bridge the Gap Between the Philosophy of Art and the Aesthetics of Nature: A Systematic Approach / Heinz Paetzold." Issues in Contemporary Culture and Aesthetics, 1997.
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