Hughes, C. D., & Aguilar, D. A. (2012). First big book of space. National Geographic.
Cita Chicago Style (17a ed.)Hughes, Catherine D., y David A. Aguilar. First Big Book of Space. Washington, D.C.: National Geographic, 2012.
Cita MLA (8a ed.)Hughes, Catherine D., y David A. Aguilar. First Big Book of Space. National Geographic, 2012.
Precaución: Estas citas no son 100% exactas.