Cita APA

Hawking, S. W. 1., & Penrose, R. 1. (1996). The nature of space and time. Princeton, New Jersey: Princeton University Press.

Citación estilo Chicago

Hawking, Stephen W. 1942-, y Roger 1931- Penrose. The Nature of Space and Time. Princeton, New Jersey: Princeton University Press, 1996.

Cita MLA

Hawking, Stephen W. 1942-, y Roger 1931- Penrose. The Nature of Space and Time. Princeton, New Jersey: Princeton University Press, 1996.