Roifah, I. et al. 2019. Factors that Affect Coping Mechanisms in Chemotherapy Patients with the Approach of Callista Roy Adaptation Theory. Jurnal Ners dan Kebidanan (Journal of Ners and Midwifery). 6, 2 (Aug. 2019), 235–240. DOI:https://doi.org/10.26699/jnk.v6i2.ART.p235-240.