World Bank, Holzmann, R., & Palmer, E. E. (2006). Pension reform: Issues and prospect for non-financial defined contribution (NDC) schemes. World Bank.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)World Bank, Robert Holzmann, و Edward E. Palmer. Pension Reform: Issues and Prospect for Non-financial Defined Contribution (NDC) Schemes. Washington, D.C.: World Bank, 2006.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)World Bank, et al. Pension Reform: Issues and Prospect for Non-financial Defined Contribution (NDC) Schemes. World Bank, 2006.