Smolin, L. (2003). Three roads to quantum gravity: A new understanding of space, time and the universe. Phoenix.
Cita Chicago Style (17a ed.)Smolin, Lee. Three Roads to Quantum Gravity: A New Understanding of Space, Time and the Universe. London: Phoenix, 2003.
Cita MLA (9a ed.)Smolin, Lee. Three Roads to Quantum Gravity: A New Understanding of Space, Time and the Universe. Phoenix, 2003.
Precaución: Estas citas no son 100% exactas.