Cita APA (7a ed.)

O'Connor, J., Ivanov, A., & Ivanov, O. (2010). Every day is Earth Day. HarperCollins.

Cita Chicago Style (17a ed.)

O'Connor, Jane, A. Ivanov, y O. Ivanov. Every Day Is Earth Day. New York: HarperCollins, 2010.

Cita MLA (8a ed.)

O'Connor, Jane, et al. Every Day Is Earth Day. HarperCollins, 2010.

Precaución: Estas citas no son 100% exactas.