APA Edition Citation

Hawking, S. W., & Penrose, R. (2000). Nature of space and time. Princeton University Press.

Chicago Edition Citation

Hawking, S. W., and Roger Penrose. Nature of Space and Time. Princeton, N.J.: Princeton University Press, 2000.

MLA Edition Citation

Hawking, S. W., and Roger Penrose. Nature of Space and Time. Princeton University Press, 2000.