Gunatilake, H., & Gunaratne, L. L. (2002). Policy options for conservating Sri Lanka's natural forests. Economy and Environment Program for Southeast Asia (EEPSEA).
Lua i Stíl Chicago (17ú heag.)Gunatilake, H.M, agus Leslie L. Gunaratne. Policy Options for Conservating Sri Lanka's Natural Forests. Tanglin, Singapore: Economy and Environment Program for Southeast Asia (EEPSEA), 2002.
Lua MLA (9ú heag.)Gunatilake, H.M, agus Leslie L. Gunaratne. Policy Options for Conservating Sri Lanka's Natural Forests. Economy and Environment Program for Southeast Asia (EEPSEA), 2002.
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