APA (7th ed.) Citation

Coles, P., & Ellis, G. F. R. (1997). Is the universe open or closed? Cambridge University Press.

Chicago Style (17th ed.) Citation

Coles, Peter, and George F. R. Ellis. Is the Universe Open or Closed? Cambridge ; New York: Cambridge University Press, 1997.

MLA (9th ed.) Citation

Coles, Peter, and George F. R. Ellis. Is the Universe Open or Closed? Cambridge University Press, 1997.