World Bank, World Bank, Asian Development Bank, & Australian Agency for International Development. (2007). Strategic directions for human development in Papua New Guinea. World Bank.
Παραπομπή σε μορφή Chicago (17η εκδ.)World Bank, World Bank, Asian Development Bank, και Australian Agency for International Development. Strategic Directions for Human Development in Papua New Guinea. Washington, D.C.: World Bank, 2007.
Παραπομπή σε μορφή MLA (9th εκδ.)World Bank, et al. Strategic Directions for Human Development in Papua New Guinea. World Bank, 2007.
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