O. D. Pranata, “Pelatihan Kompetisi Sains Nasional (KSN) Cabang Matematika Tingkat SMP/MTs melalui Pembelajaran Berbasis Puzzle (National Science Competition Training for Junior High School/MTs Mathematics Through Puzzle-Based Learning)”, JPMMP, vol. 5, no. 2, pp. 118–124, Oct. 2021.