à¸ˆà¸²à¸£à¸¶à¸à¸¨à¸´à¸¥à¸›à¹Œ, à., & à¹‚à¸™à¸£à¸´à¸¢à¸², à. 2016 Aug 17. à¸à¸²à¸£à¸ªà¸£à¹‰à¸²à¸‡à¸à¸±à¸•à¸¥à¸±à¸à¸©à¸“à¹Œà¸™à¸±à¸à¸à¸µà¸¬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] 27:2