Wan Syirli Dastoria, Dharma Lindarto, Wika Hanida Lubis & Habibah Hanum Nasution. “CORRELATION OF BECK DEPRESSION INVENTORY II (BDI II) SCORE AND VASCULAR ENDOTHELIAL GROWTH FACTOR (VEGF) LEVELS IN TYPE 2 DIABETES MELITUS PATIENTS”. International Journal of Research Science and Management, vol. 7, no. 1, Jan. 2020, pp. 8-16, http://ijrsm.com/index.php/journal-ijrsm/article/view/60.