APA aipamena

Earth Works Group (U.S.). (1989). 50 simple things you can do to save the earth. Earthworks Press.

Chicago Style aipamena

Earth Works Group (U.S.). 50 Simple Things You Can Do to Save the Earth. Berkeley, Calif: Earthworks Press, 1989.

MLA aipamena

Earth Works Group (U.S.). 50 Simple Things You Can Do to Save the Earth. Earthworks Press, 1989.