APA استشهاد

Posamentier, A. S., & Lehmann, I. (2007). Biography of the world's most mysterious number. Universities Press.

استشهاد بنمط شيكاغو

Posamentier, Alfred S., و Ingmar Lehmann. Biography of the World's Most Mysterious Number. Hyderabad: Universities Press, 2007.

MLA استشهاد

Posamentier, Alfred S., و Ingmar Lehmann. Biography of the World's Most Mysterious Number. Universities Press, 2007.