Cita APA (7a ed.)

UNESCO. (1990). Environmental education: Selected activities of Unesco-UNEP International Environmental Education Programme 1975-1990. UNESCO.

Cita Chicago Style (17a ed.)

UNESCO. Environmental Education: Selected Activities of Unesco-UNEP International Environmental Education Programme 1975-1990. Paris: UNESCO, 1990.

Cita MLA (9a ed.)

UNESCO. Environmental Education: Selected Activities of Unesco-UNEP International Environmental Education Programme 1975-1990. UNESCO, 1990.