APA stil citiranja

Penrose, R. (2005). The road to reality: The road to reality : a complete guide to the laws of the Universe. London: Vintage Books.

Chicago stil citiranja

Penrose, Roger. The road to reality: The road to reality : a complete guide to the laws of the Universe. London: Vintage Books, 2005.

MLA stil citiranja

Penrose, Roger. The road to reality: The road to reality : a complete guide to the laws of the Universe. London: Vintage Books, 2005.