à¹€à¸—à¸¨à¹€à¸£à¸µà¸¢à¸™, à., & à¸”à¸³à¸£à¸‡à¸ªà¸à¸™, à. 2017 May 25. à¹à¸™à¸§à¸—à¸²à¸‡à¸à¸²à¸£à¸žà¸±à¸’à¸™à¸²à¸§à¸²à¸£à¸ªà¸²à¸£à¹„à¸—à¸¢à¸”à¹‰à¸§à¸¢ Google Scholar | Development Thai Journal by Google Scholar. PULINET Journal. [Online] 4:2