Diederich, A. F. (1957). A history of accreditation, certification, and teacher training in Catholic institutions of higher learning in California.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Diederich, Alphonsus Francis. A History of Accreditation, Certification, and Teacher Training in Catholic Institutions of Higher Learning in California. 1957.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Diederich, Alphonsus Francis. A History of Accreditation, Certification, and Teacher Training in Catholic Institutions of Higher Learning in California. 1957.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.