Rühl, O. Educating about the mass murder of people with disabilities. Mass murder of people with disabilities and the Holocaust.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Rühl, Otto. "Educating About the Mass Murder of People with Disabilities." Mass Murder of People with Disabilities and the Holocaust .
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Rühl, Otto. "Educating About the Mass Murder of People with Disabilities." Mass Murder of People with Disabilities and the Holocaust, .
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