Sri Yunita Perangin Angin. “The Effect of Anxiety Levels and Coping Mechanism of The Primigravida Against the Length of First Stage of Spontant Labor”. EMBRIO: Jurnal Kebidanan 12, no. 2 (January 7, 2021): 119–128. Accessed July 17, 2026. https://jurnal.unipasby.ac.id/embrio/article/view/2877.