Sri Yunita Perangin Angin. The Effect of Anxiety Levels and Coping Mechanism of The Primigravida Against the Length of First Stage of Spontant Labor. EMB [Internet]. 2021 Jan. 7 [cited 2026 Jul. 17];12(2):119-28. Available from: https://jurnal.unipasby.ac.id/embrio/article/view/2877