Cita APA (7a ed.)
Penrose, R. The Road to Reality: A Complete Guide to the Laws of the Universe. Vintage Books.
Cita estilo Chicago (17a ed.)
Penrose, Roger. The Road to Reality: A Complete Guide to the Laws of the Universe. Nueva York, EUA: Vintage Books.
Cita MLA (9a ed.)
Penrose, Roger. The Road to Reality: A Complete Guide to the Laws of the Universe. Vintage Books.
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