World Bank & Holzmann, R. (2001). New ideas about old age security: Toward sustainable pension systems in the 21st century. World Bank.
Παραπομπή σε μορφή Chicago (17η εκδ.)World Bank και Robert Holzmann. New Ideas About Old Age Security: Toward Sustainable Pension Systems in the 21st Century. Washington, DC: World Bank, 2001.
Παραπομπή σε μορφή MLA (9th εκδ.)World Bank και Robert Holzmann. New Ideas About Old Age Security: Toward Sustainable Pension Systems in the 21st Century. World Bank, 2001.
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