Cita APA

Dummett, P., Hughes, J. 1., & Stephenson, H. (2015). Life 6. Boston, MA: National Geographic Learning.

Citación estilo Chicago

Dummett, Paul, John 1966- Hughes, y Helen Stephenson. Life 6. Boston, MA: National Geographic Learning, 2015.

Cita MLA

Dummett, Paul, John 1966- Hughes, y Helen Stephenson. Life 6. Boston, MA: National Geographic Learning, 2015.