Gunatilake, H. (2006). Willingness-to-pay and design of water supply and sanitation projects: A case study. Asian Development Bank.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGunatilake, Herath. Willingness-to-pay and Design of Water Supply and Sanitation Projects: A Case Study. [Mandaluyong City]: Asian Development Bank, 2006.
एमएलए (9वां संस्करण) प्रशस्ति पत्रGunatilake, Herath. Willingness-to-pay and Design of Water Supply and Sanitation Projects: A Case Study. Asian Development Bank, 2006.
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