Stephen Hawking & Roger Penrose. (1998). The nature of space and time. Oxford University Press.
Chicago Edition CitationStephen Hawking and Roger Penrose. The Nature of Space and Time. New Delhi: Oxford University Press, 1998.
MLA Edition CitationStephen Hawking and Roger Penrose. The Nature of Space and Time. Oxford University Press, 1998.
Warning: These citations may not always be 100% accurate.