Phumonsakul, S., P. Suksanguan, and C. Khanobdee. “Development of Labor Support Scale for Intrapartum Nurse”. Nursing Research and Innovation Journal, vol. 22, no. 3, Feb. 2017, pp. 247-62, https://he02.tci-thaijo.org/index.php/RNJ/article/view/39777.