Hartman, R. S., Huq, M., & Wheeler, D. (1997). Why paper mills clean up: Determinants of pollution abatement in four Asian countries. World Bank.
Lua i Stíl Chicago (17ú heag.)Hartman, Raymond S., Mainul Huq, agus David Wheeler. Why Paper Mills Clean Up: Determinants of Pollution Abatement in Four Asian Countries. Washington, DC: World Bank, 1997.
Lua MLA (9ú heag.)Hartman, Raymond S., et al. Why Paper Mills Clean Up: Determinants of Pollution Abatement in Four Asian Countries. World Bank, 1997.
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