Rugg, H. O. (1917). Statistical methods applied to education: A textbook for students of education in the quantitative study of school problems. Houghton Mifflin Company.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Rugg, Harold Ordway. Statistical Methods Applied to Education: A Textbook for Students of Education in the Quantitative Study of School Problems. Boston, New York [etc.]: Houghton Mifflin Company, 1917.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Rugg, Harold Ordway. Statistical Methods Applied to Education: A Textbook for Students of Education in the Quantitative Study of School Problems. Houghton Mifflin Company, 1917.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.