I. El Malky, Maaly, et al. “The Effectiveness of Social Skill Training on Depressive Symptoms, Self- Esteem and Interpersonal Difficulties Among Schizophrenic Patients”. International Journal of Advanced Nursing Studies, vol. 5, no. 1, Jan. 2016, pp. 43-50, https://doi.org/10.14419/ijans.v5i1.5386.