Siregar, P., E. Susalit, R. Wirawan, S. Setiati, and Sarwono W. “Optimal Water Intake for the Elderly: Prevention of Hypotremia”. Medical Journal of Indonesia 18, no. 1 (February 1, 2009): 18–24. Accessed December 23, 2024. https://mji.ui.ac.id/journal/index.php/mji/article/view/337.