@book{829242,
	author = {Office of the permanent secretary ministry of tourism and sports},
	title = {Front office functional competencies provide international direct dial (IDD) service information},
	publisher = {Office of the permanent secretary ministry of tourism and sports,},
	year = {2015.},
	series = {Front office functional competencies provide international direct dial (IDD) service information},
	address = {Bangkok :}
}