2. the variables used in the study.-Variable costs A presentation with the use of the system aendona APPI vacation.-Variable according to listen and observe.
2. The variables used in the study - the variable presentation with the Apple Computer Co. in Ann Ward wait Jersey - variable listening were implemented correctly.
2. Variables used in this study - variables, presentation, along with the use of the application in the system and card รอย์ - dependent variable, listening and used to perform correctly