Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.