Hawking,Stephen, & Penrose,Roger. (1999). The Nature of Space and Time. OUP.
Chicago Edition CitationHawking,Stephen, and Penrose,Roger. The Nature of Space and Time. Delhi: OUP, 1999.
Deismireacht MLAHawking,Stephen, and Penrose,Roger. The Nature of Space and Time. OUP, 1999.
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