APA-ийн эшлэл(7 дахь хэвлэлт)

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

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

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

MLA -ийн эшлэл (9 дэх хэвлэлт)

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