Klitgaard, R. E. (1978). The decline of the bestn: An analysis of the relationship between declining enrollments, Ph.D production and research -- December 1978. s.n.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Klitgaard, Robert E. The Decline of the Bestn: An Analysis of the Relationship Between Declining Enrollments, Ph.D Production and Research -- December 1978. s.l: s.n, 1978.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Klitgaard, Robert E. The Decline of the Bestn: An Analysis of the Relationship Between Declining Enrollments, Ph.D Production and Research -- December 1978. s.n, 1978.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.