Clark, R., & Morrill, M. S. (2016). Extending Work Life: Can Employers Adapt When Employees Want to Delay Retirement? W.E. Upjohn Institute for Employment Research.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Clark, Robert, و Melinda S. Morrill. Extending Work Life: Can Employers Adapt When Employees Want to Delay Retirement? Kalamazoo, Michigan: W.E. Upjohn Institute for Employment Research, 2016.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Clark, Robert, و Melinda S. Morrill. Extending Work Life: Can Employers Adapt When Employees Want to Delay Retirement? W.E. Upjohn Institute for Employment Research, 2016.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.