توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Evans, D. L., & Cooper, K. B. B. An Aging World: 2001 /U.S. Department of Commerce. Economics and Statistics Asministration. Government Printing Office.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Evans, Donald L., و Kathleen B Barron Cooper. An Aging World: 2001 /U.S. Department of Commerce. Economics and Statistics Asministration. Washington, D.C: Government Printing Office.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

Evans, Donald L., و Kathleen B Barron Cooper. An Aging World: 2001 /U.S. Department of Commerce. Economics and Statistics Asministration. Government Printing Office.