APA (7th ed.) Citation

DeVorkin, D. H., & Smith, R. W. (2015). The Hubble cosmos: 25 years of new vistas in space. National Geographic.

Chicago Style (17th ed.) Citation

DeVorkin, David H., and Robert W. Smith. The Hubble Cosmos: 25 Years of New Vistas in Space. Washington, D.C.: National Geographic, 2015.

MLA (9th ed.) Citation

DeVorkin, David H., and Robert W. Smith. The Hubble Cosmos: 25 Years of New Vistas in Space. National Geographic, 2015.