Gibbons, G., & Hawking, S. W. e. (1993). Euclidean quantum gravity. World Scientific.
Dyfyniad Arddull ChicagoGibbons, G.W., and S. W. ed Hawking. Euclidean Quantum Gravity. Singapore: World Scientific, 1993.
Dyfyniad MLAGibbons, G.W., and S. W. ed Hawking. Euclidean Quantum Gravity. World Scientific, 1993.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.