Asian Development Bank & Abeygunawardena, P. (1999). Environment and economics in project preparation: Ten Asian cases. Asian Development Bank.
Lua i Stíl Chicago (17ú heag.)Asian Development Bank agus P. Abeygunawardena. Environment and Economics in Project Preparation: Ten Asian Cases. Manila, Philippines: Asian Development Bank, 1999.
Lua MLA (9ú heag.)Asian Development Bank agus P. Abeygunawardena. Environment and Economics in Project Preparation: Ten Asian Cases. Asian Development Bank, 1999.
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