Gray, W. S., & Liguori, S. C. (2003). Hotel and motel management and operations (4th ed.). PH/PTR.
芝加哥风格引文Gray, William S., 与 Salvatore C. Liguori. Hotel and Motel Management and Operations. 4th ed. Upper Saddle River, N.J: PH/PTR, 2003.
MLA引文Gray, William S., 与 Salvatore C. Liguori. Hotel and Motel Management and Operations. 4th ed. PH/PTR, 2003.
警告：这些引文格式不一定是100％准确.