Style de citation APA (7e éd.)

Hawking, S. W., & Penrose, R. (1996). The nature of space and time. Princeton University Press, ; Oxford University Press.

Style de citation Chicago (17e éd.)

Hawking, S. W., et Roger Penrose. The Nature of Space and Time. Princeton, N.J. : New York ; New Delhi: Princeton University Press, ; Oxford University Press, 1996.

Style de citation MLA (8e éd.)

Hawking, S. W., et Roger Penrose. The Nature of Space and Time. Princeton University Press, ; Oxford University Press, 1996.