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Lua i Stíl Chicago (17ú heag.)Sajise, Asa Jose, Jindra Nuella G. Samson, Lotis Quiao, Jasmin Sibal, David A. Raitzer, agus Dieldre Harder. Contingent Valuation of Nonmarket Benefits in Project Economic Analysis: A Guide to Good Practice. Manila,Philippines: Asian Development Bank, 2021.
Lua MLA (9ú heag.)Sajise, Asa Jose, et al. Contingent Valuation of Nonmarket Benefits in Project Economic Analysis: A Guide to Good Practice. Asian Development Bank, 2021.
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