Somroop, Areeya, Krittika Thummarattanakul, Ngarmeak Lammana, and Kriangkrai Tassanavipas. “Portable Labor and Delivery Training Box Innovation: Instructional Media”. Nursing Journal CMU 52, no. 3 (September 30, 2025): 285–296. accessed September 24, 2026. https://he02.tci-thaijo.org/index.php/cmunursing/article/view/273043.