Jacobs, B., & Jacobs, J. (2015). Life is good: The book. National Geographic.
Cita Chicago Style (17a ed.)Jacobs, Bert, y John Jacobs. Life Is Good: The Book. Washington, D.C.: National Geographic, 2015.
Cita MLA (8a ed.)Jacobs, Bert, y John Jacobs. Life Is Good: The Book. National Geographic, 2015.
Precaución: Estas citas no son 100% exactas.