Frank Gibney. (1972). Miracle by design. New York: Times Books.
Dyfyniad Arddull ChicagoFrank Gibney. Miracle By Design. New York: Times Books, 1972.
Dyfyniad MLAFrank Gibney. Miracle By Design. New York: Times Books, 1972.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.