Thanakorn Thepnarong และ Kittitas Wancham. (2026) Development of Parallelism Test on Linear Equations with One Variable. <i>An Online Journal of Education (OJED)</i>, <i>21</i>(2), 1-20.Thanakorn Thepnarong และ Kittitas Wancham. "Development of Parallelism Test on Linear Equations with One Variable". An Online Journal of Education (OJED) 21 (2026):1-20.Thanakorn Thepnarong และ Kittitas Wancham. Development of Parallelism Test on Linear Equations with One Variable. Centre for Education Innovation, Print and Online Media:ม.ป.ท. 2026.