Iowa State Teachers' Association. Committee on Vocational Education and Vocational Guidance & Iowa. Dept. of Public Instruction. (1914). Vocational education and vocational guidance: A survey and preliminary report by a committee appointed by the Iowa State Teachers' Association. Dept. of Public Instruction.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Iowa State Teachers' Association. Committee on Vocational Education and Vocational Guidance و Iowa. Dept. of Public Instruction. Vocational Education and Vocational Guidance: A Survey and Preliminary Report by a Committee Appointed by the Iowa State Teachers' Association. [Des Moines, Iowa?]: Dept. of Public Instruction, 1914.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Iowa State Teachers' Association. Committee on Vocational Education and Vocational Guidance و Iowa. Dept. of Public Instruction. Vocational Education and Vocational Guidance: A Survey and Preliminary Report by a Committee Appointed by the Iowa State Teachers' Association. Dept. of Public Instruction, 1914.