Ryan, J. M., Hess, R. K., & Freed, M. N. (1991). Handbook of statistical procedures and their computer applications to education and behavioral sciences. American Council on Education/Macmillan.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ryan, Joseph M., Robert K. Hess, و Melvyn N. Freed. Handbook of Statistical Procedures and Their Computer Applications to Education and Behavioral Sciences. New York: American Council on Education/Macmillan, 1991.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Ryan, Joseph M., et al. Handbook of Statistical Procedures and Their Computer Applications to Education and Behavioral Sciences. American Council on Education/Macmillan, 1991.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.