Horton, R. E. (1928). Measurable outcomes of individual laboratory work in high school chemistry. Teachers college, Columbia university.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Horton, Ralph Ellison. Measurable Outcomes of Individual Laboratory Work in High School Chemistry. New York city: Teachers college, Columbia university, 1928.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Horton, Ralph Ellison. Measurable Outcomes of Individual Laboratory Work in High School Chemistry. Teachers college, Columbia university, 1928.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.