APA (7th ed.) Citation

(1989). 50 Simple Things You Can Do To Save The Earth. Earthworks Press.

Chicago Style (17th ed.) Citation

50 Simple Things You Can Do To Save The Earth. Berkeley, CA: Earthworks Press, 1989.

MLA (9th ed.) Citation

50 Simple Things You Can Do To Save The Earth. Earthworks Press, 1989.

Warning: These citations may not always be 100% accurate.