Cita APA (7a ed.)

Council for Environmental Education (Reading, Berkshire). (1979). Directory of environmental literature and teaching aids. Council for Environmental Education.

Cita Chicago Style (17a ed.)

Council for Environmental Education (Reading, Berkshire). Directory of Environmental Literature and Teaching Aids. Reading: Council for Environmental Education, 1979.

Cita MLA (8a ed.)

Council for Environmental Education (Reading, Berkshire). Directory of Environmental Literature and Teaching Aids. Council for Environmental Education, 1979.