Friedman, M., & Schäffner, W. On folding: Introduction of a new field of interdisciplinary research / Michael Friedman. Wolfgang Schäffner. On folding : towards a new field of interdisciplinary research.(2016).
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Friedman, Michael, و Wolfgang Schäffner. "On Folding: Introduction of a New Field of Interdisciplinary Research / Michael Friedman. Wolfgang Schäffner." On Folding : Towards a New Field of Interdisciplinary Research.(2016) .
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Friedman, Michael, و Wolfgang Schäffner. "On Folding: Introduction of a New Field of Interdisciplinary Research / Michael Friedman. Wolfgang Schäffner." On Folding : Towards a New Field of Interdisciplinary Research.(2016), .
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