Roifah, Ifa, et al. “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), vol. 6, no. 2, Aug. 2019, pp. 235-40, doi:10.26699/jnk.v6i2.ART.p235-240.