Cita APA (7a ed.)

Riley, P., & Carpenter, C. (2009). 100 things you should know about planet earth. Miles Kelly.

Cita Chicago Style (17a ed.)

Riley, Peter, y Clive Carpenter. 100 Things You Should Know About Planet Earth. England: Miles Kelly, 2009.

Cita MLA (8a ed.)

Riley, Peter, y Clive Carpenter. 100 Things You Should Know About Planet Earth. Miles Kelly, 2009.

Precaución: Estas citas no son 100% exactas.