Lehner, C. Everettęs Observer: A New Rational Psychology? / Christoph Lehner. Sciences of the interface : proceedings of the International Symposium Sciences of the Interface, ZKM, Center for Art and Media, Karlsruhe Germany, May 18-21, 1999.(2001).
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Lehner, Christoph. "Everettęs Observer: A New Rational Psychology? / Christoph Lehner." Sciences of the Interface : Proceedings of the International Symposium Sciences of the Interface, ZKM, Center for Art and Media, Karlsruhe Germany, May 18-21, 1999.(2001) .
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Lehner, Christoph. "Everettęs Observer: A New Rational Psychology? / Christoph Lehner." Sciences of the Interface : Proceedings of the International Symposium Sciences of the Interface, ZKM, Center for Art and Media, Karlsruhe Germany, May 18-21, 1999.(2001), .