N. Wongdech, A. Sangarwut, and P. Srisawad, “THE DEVELOPMENT OF READING COMPREHENSION SKILL BY USING ACTIVITY PACKAGES WITH BASED ON GAMIFICATION AND 6-STEPS LADDER TECHNIQUE FOR SECONDARY 1 STUDENTS AT PHUNPHINPITTAYAKOM SCHOOL”, JMND, vol. 13, no. 9, pp. 140–149, Aug. 2026.