Paetzold, H. (1997). 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.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)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.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)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.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.