APA استشهاد

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

استشهاد بنمط شيكاغو

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

MLA استشهاد

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