à¸ˆà¸£à¸”à¸¥, à., & à¸ªà¸¸à¸—à¸˜à¸²à¹€à¸§à¸¨, à. 2013 Sep 1. à¸à¸²à¸£à¸ˆà¸±à¸”à¸šà¸£à¸´à¸à¸²à¸£à¸”à¹‰à¸²à¸™à¸à¸²à¸£à¸ˆà¹‰à¸²à¸‡à¸‡à¸²à¸™à¸‚à¸à¸‡à¸£à¸±à¸à¹à¸à¹ˆà¸„à¸™à¸žà¸´à¸à¸²à¸£. 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] 24:3