Cita APA (7a ed.)

Nelson, G., Wozniak, P. R., & Campbell, S. (2002). Beyond Earth Day: Fulfilling the Promise. University of Wisconsin Press.

Cita Chicago Style (17a ed.)

Nelson, Gaylord, Paul R. Wozniak, y Susan Campbell. Beyond Earth Day: Fulfilling the Promise. Madison, Wis.: University of Wisconsin Press, 2002.

Cita MLA (8a ed.)

Nelson, Gaylord, et al. Beyond Earth Day: Fulfilling the Promise. University of Wisconsin Press, 2002.