Jansen, U. H. (1960). Marking and reporting procedures in the secondary schools of Texas. Texas Study of Secondary Education.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Jansen, Udo H. Marking and Reporting Procedures in the Secondary Schools of Texas. Austin: Texas Study of Secondary Education, 1960.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Jansen, Udo H. Marking and Reporting Procedures in the Secondary Schools of Texas. Texas Study of Secondary Education, 1960.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.