Citazione APA

Posamentier, A. S., & Lehmann, I. (2006). Pi: A biography of the world's most mysterious number. Universities Press.

Stile di citazione Chicago

Posamentier, Alfred S., e Ingmar Lehmann. Pi: A Biography of the World's Most Mysterious Number. Hyderabad: Universities Press, 2006.

Citazione MLA

Posamentier, Alfred S., e Ingmar Lehmann. Pi: A Biography of the World's Most Mysterious Number. Universities Press, 2006.