Lawler, J., & Skerry, B. (2013). Ocean counting. National Geographic Kids.
Cita Chicago Style (17a ed.)Lawler, Janet, y Brian Skerry. Ocean Counting. Washington, D.C.: National Geographic Kids, 2013.
Cita MLA (8a ed.)Lawler, Janet, y Brian Skerry. Ocean Counting. National Geographic Kids, 2013.
Precaución: Estas citas no son 100% exactas.