Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.