Panurak Ngamchitrungruang. 2007. Reservation system improvement for hotel industry. Field of Study Engineering Management, Chulalongkorn University;
Panurak Ngamchitrungruang. (2007) Reservation system improvement for hotel industry . Chulalongkorn University/Bangkok.
Panurak Ngamchitrungruang. Reservation system improvement for hotel industry. . Bangkok:Chulalongkorn University, 2007.
Panurak Ngamchitrungruang. (2007) Reservation system improvement for hotel industry . Chulalongkorn University/Bangkok.