Baker, H. J. (1927). Characteristic differences in bright and dull pupils: An interpretation of mental differences, with special reference to teaching procedures. Public school publishing company.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Baker, Harry Jay. Characteristic Differences in Bright and Dull Pupils: An Interpretation of Mental Differences, with Special Reference to Teaching Procedures. Bloomington, Ill: Public school publishing company, 1927.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Baker, Harry Jay. Characteristic Differences in Bright and Dull Pupils: An Interpretation of Mental Differences, with Special Reference to Teaching Procedures. Public school publishing company, 1927.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.