Vallen, Gary K. Check-in check-out: managing hotel operations/ Gary K. Vallen. - 8th ed. - Singapore: Prentice Hall, c2009. - 604 p.: ill.; 26 cm. Includes index ISBN: 978-981-06-9752-5 Subjects--Topical Terms: Hotel management. Dewey Class. No.: GC 647.94068 V183 2009