Siregar, G. A., Halim, S. and Sitepu, R. R. (2016) “Dyspepsia and Depression, Anxiety, Stress Scales (DASS) Score”, The Indonesian Journal of Gastroenterology, Hepatology, and Digestive Endoscopy, 17(1), pp. 28–31. doi: 10.24871/171201628-31.