Kerley, B. (2013). The world is waiting for you. National Geographic.
Cita Chicago Style (17a ed.)Kerley, Barbara. The World Is Waiting for You. Washington, DC: National Geographic, 2013.
Cita MLA (8a ed.)Kerley, Barbara. The World Is Waiting for You. National Geographic, 2013.
Precaución: Estas citas no son 100% exactas.