Worldchanging, revised & updated : a user's guide for the 21st century

MLA

Bluestone, Carissa, Bill McKibben, and Alex Steffen. Worldchanging, Revised & Updated : a User's Guide for the 21st Century. New York (N.Y.): Abrams, 2011.

APA

Bluestone, C., McKibben, B., & Steffen, A. (2011). Worldchanging, revised & updated : a user's guide for the 21st century. New York (N.Y.): Abrams.

Chicago

Bluestone, Carissa, Bill McKibben, and Alex Steffen. Worldchanging, Revised & Updated: A User's Guide for the 21st Century. New York (N.Y.): Abrams, 2011.