à¸ˆà¸µà¸™à¸˜à¸²à¸”à¸², à., à¸ªà¸±à¸‡à¸‚à¹Œà¸—à¸à¸‡, à., & à¸Šà¸¹à¸ªà¸¸à¸§à¸£à¸£à¸“, à. 2016 Nov 15. à¸„à¸§à¸²à¸¡à¸¢à¸¸à¸•à¸´à¸˜à¸£à¸£à¸¡à¸—à¸²à¸‡à¸ªà¸±à¸‡à¸„à¸¡à¸à¸±à¸šà¸à¸²à¸£à¸ˆà¸±à¸”à¸à¸²à¸£à¸¨à¸¶à¸à¸©à¸². à¸§à¸²à¸£à¸ªà¸²à¸£à¸§à¸´à¸—à¸¢à¸šà¸£à¸´à¸à¸²à¸£ à¸¡à¸«à¸²à¸§à¸´à¸—à¸¢à¸²à¸¥à¸±à¸¢à¸ªà¸‡à¸‚à¸¥à¸²à¸™à¸„à¸£à¸´à¸™à¸—à¸£à¹Œ | Academic Services Journal, Prince of Songkla University. [Online] 27:3