Heeter, S. V. (2002). The effects of judgments of learning and locus of control on achievement of various educational objectives and allocated study time. The Pennsylvania State University.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Heeter, Sonja V. The Effects of Judgments of Learning and Locus of Control on Achievement of Various Educational Objectives and Allocated Study Time. University Park, Pa.: The Pennsylvania State University, 2002.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Heeter, Sonja V. The Effects of Judgments of Learning and Locus of Control on Achievement of Various Educational Objectives and Allocated Study Time. The Pennsylvania State University, 2002.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.