Gray, William S. Hotel and motel management and operations / William S. Gray, Salvatore C. Liguori - Englewood Cliffs, N. J. : Prentice-Hall, 1980. - xviii, 360 p. : ill. ; 24 cm. Includes index. ISBN: 0133949087 LCCN: 79-21081 Subjects--Topical Terms: Hotel management.Motel management.