Illinois. State Superintendent of Public Instruction & University of Illinois (Urbana-Champaign campus). (1935). The Recognition and accrediting of Illinois secondary schools: Conditions for recognition by the State Superintendent of Public Instruction and for accrediting by the University of Illinois. University of Illinois Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Illinois. State Superintendent of Public Instruction و University of Illinois (Urbana-Champaign campus). The Recognition and Accrediting of Illinois Secondary Schools: Conditions for Recognition by the State Superintendent of Public Instruction and for Accrediting by the University of Illinois. [Urbana, Ill.: University of Illinois Press, 1935.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Illinois. State Superintendent of Public Instruction و University of Illinois (Urbana-Champaign campus). The Recognition and Accrediting of Illinois Secondary Schools: Conditions for Recognition by the State Superintendent of Public Instruction and for Accrediting by the University of Illinois. University of Illinois Press, 1935.