N. P. D. A. Anggraeni and B. E. P. . Saudia, “Gambaran Tingkat Kecemasan dan Kadar Hormon Kortisol Ibu Nifas: Anxiety and Cortisol Levels among Postpartum Mother’s”, JBC, vol. 3, no. 2, pp. 55–63, Jun. 2021.