(1971). The Journal of environmental education. Dembar Educational Research Services.
Chicago-čujuhus (17. p.)The Journal of Environmental Education. Madison, Wis.: Dembar Educational Research Services, 1971.
MLA-čujuhus (9. p.)The Journal of Environmental Education. Dembar Educational Research Services, 1971.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.