Wirgau, A. B. (2011). Michigan leaders and time: A dissertation submitted to the graduate school in candidacy for the degree of Doctor of Education.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Wirgau, Andrea B. Michigan Leaders and Time: A Dissertation Submitted to the Graduate School in Candidacy for the Degree of Doctor of Education. 2011.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Wirgau, Andrea B. Michigan Leaders and Time: A Dissertation Submitted to the Graduate School in Candidacy for the Degree of Doctor of Education. 2011.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.