Cita APA

Bowman, R. (2008). Six degrees could change the world. México: National Geographic Society.

Citación estilo Chicago

Bowman, Ron. Six Degrees Could Change the World. México: National Geographic Society, 2008.

Cita MLA

Bowman, Ron. Six Degrees Could Change the World. México: National Geographic Society, 2008.

Precaución: Estas citas no son 100% exactas.