APA (7th ed.) Citation

Zubrin, R., & Schmidt, S. (1996). Islands in the sky: Bold new ideas for colonizing space. John Wiley.

Chicago Style (17th ed.) Citation

Zubrin, Robert, and Stanley Schmidt. Islands in the Sky: Bold New Ideas for Colonizing Space. New York: John Wiley, 1996.

MLA (8th ed.) Citation

Zubrin, Robert, and Stanley Schmidt. Islands in the Sky: Bold New Ideas for Colonizing Space. John Wiley, 1996.