एपीए उद्धरण

Smolin, L. (2002). Three roads to quantum gravity. Basic Books.

शिकागो स्टाइल उद्धरण

Smolin, Lee. Three Roads to Quantum Gravity. New York, N.Y: Basic Books, 2002.

एमएलए उद्धरण

Smolin, Lee. Three Roads to Quantum Gravity. Basic Books, 2002.