Nuraeni, Aan, Ristina Mirwanti, and Anastasia Anna. 2019. “EFFECT OF A WORKBOOK IN HEALTH EDUCATION ON SELF-EFFICACY AND QUALITY OF LIFE OF PATIENTS WITH CORONARY HEART DISEASE”. Belitung Nursing Journal 5 (6), 218-24. https://doi.org/10.33546/bnj.801.