Schimmel, A., & Endres, F. C. (1993). The mystery of numbers. Oxford University Press.
Dyfyniad Arddull ChicagoSchimmel, Annemarie, and Franz Carl Endres. The Mystery of Numbers. New York: Oxford University Press, 1993.
Dyfyniad MLASchimmel, Annemarie, and Franz Carl Endres. The Mystery of Numbers. Oxford University Press, 1993.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.