Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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