à¹€à¸¥à¸´à¸¨à¸žà¸‡à¸©à¹Œà¸ªà¸¡à¸šà¸±à¸•à¸´, à., à¸ªà¸´à¸—à¸˜à¸´à¸Šà¸±à¸¢, à., à¹à¸‹à¹ˆà¸‰à¸±à¹ˆà¸™, à., & à¹€à¸—à¸žà¸à¸², à. 2016 Aug 17. à¸žà¸¤à¸•à¸´à¸à¸£à¸£à¸¡à¸à¸²à¸£à¸£à¸¹à¹‰à¸ªà¸²à¸£à¸ªà¸™à¹€à¸—à¸¨à¸‚à¸à¸‡à¸™à¸±à¸à¸¨à¸¶à¸à¸©à¸²à¸¡à¸«à¸²à¸§à¸´à¸—à¸¢à¸²à¸¥à¸±à¸¢à¸ªà¸‡à¸‚à¸¥à¸²à¸™à¸„à¸£à¸´à¸™à¸—à¸£à¹Œ. 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] 27:2