Omtzigt, D. (2006). Aging and the interaction between education, retirement and the working life. Department of Economics (University of Oxford).
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Omtzigt, D. Aging and the Interaction Between Education, Retirement and the Working Life. Department of Economics (University of Oxford), 2006.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Omtzigt, D. Aging and the Interaction Between Education, Retirement and the Working Life. Department of Economics (University of Oxford), 2006.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.