Παραπομπή APA

Penrose, R. (2004). The road to reality: A complete guide to the laws of the universe. London: Jonathan Cape.

Παραπομπή Chicago Style

Penrose, Roger. The Road to Reality: A Complete Guide to the Laws of the Universe. London: Jonathan Cape, 2004.

Παραπομπή MLA

Penrose, Roger. The Road to Reality: A Complete Guide to the Laws of the Universe. London: Jonathan Cape, 2004.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.