APA aipamena

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

Chicago Style aipamena

Coles, Peter, and George Francis Rayner Ellis. Is the Universe Open or Closed? Cambridge: Cambridge University Press, 1997.

MLA aipamena

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