Walker, J. R. (1996). Introduction to hospitality. Prentice Hall.
Dyfyniad Arddull ChicagoWalker, John R. Introduction to Hospitality. Upper Saddle River, N.J: Prentice Hall, 1996.
Dyfyniad MLAWalker, John R. Introduction to Hospitality. Prentice Hall, 1996.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.