Gaya APA

Environmental indicators : a systematic approah to measuring and reporting on environmental policy performance in the context of sustainable development / edited by : Alen Hammond...[et al.]. (1995). : New York : World Resources Institute.

Gaya MLA

Environmental indicators : a systematic approah to measuring and reporting on environmental policy performance in the context of sustainable development / edited by : Alen Hammond...[et al.]. . : New York : World Resources Institute, 1995. Text.