Van Wyngarden, D. K. The Union Institute and its learners' perspective of an andragogical model of higher education: A project demonstrating excellence. University Microfilms International.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Van Wyngarden, Diane K. The Union Institute and Its Learners' Perspective of an Andragogical Model of Higher Education: A Project Demonstrating Excellence. Ann Arbor, MI.: University Microfilms International.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Van Wyngarden, Diane K. The Union Institute and Its Learners' Perspective of an Andragogical Model of Higher Education: A Project Demonstrating Excellence. University Microfilms International.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.