P. Kov, Sok, H., Roth, S., Chhoeun, K., y Hutton, G.,
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G. Hutton, Rodriguez, U. E., Napitupulu, L., Thang, P., y Kov, P.,
«Economic impacts of sanitation in Southeast Asia : a four-country study conducted in Cambodia, Indonesia, the Philippines and Vietnam under the Economics of Sanitation Initiative (ESI)». Water and Sanitation Program - East Asia and the Pacific, WSP-EAP, Jakarta, Indonesia, p. 144 p. : 18 fig., 8 plate, 93 tab., 2008.