Suwito, J., S. T. Putra, and A. Sulistyono. “The Affirmation – Tapping on Pain Perception and Serotonin Serum Level of Post – Caesarian Section Patients”. Jurnal Ners, vol. 14, no. 2, Dec. 2019, pp. 124-8, doi:10.20473/jn.v14i2.16421.