Upady Hatthasin และผู้แต่งคนอื่นๆ. (2018) Development of an Obstacle-warning Glasses for the Visually Impaired Student. <i>RMUTL Engineering Journal</i>, <i>3</i>(2), 15-25.Upady Hatthasin และผู้แต่งคนอื่นๆ. "Development of an Obstacle-warning Glasses for the Visually Impaired Student". RMUTL Engineering Journal 3 (2018):15-25.Upady Hatthasin และผู้แต่งคนอื่นๆ. Development of an Obstacle-warning Glasses for the Visually Impaired Student. Rajamangala University of Technology Lanna:ม.ป.ท. 2018.