(Earth Works Group (U.S. (1989). 50 simple things you can do to save the earth. Earthworks Press.
Lua i Stíl Chicago (17ú heag.)(Earth Works Group (U.S. 50 Simple Things You Can Do to Save the Earth. .Berkeley, CA: Earthworks Press, 1989.
Lua MLA (9ú heag.)(Earth Works Group (U.S. 50 Simple Things You Can Do to Save the Earth. Earthworks Press, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.