R. . Federik Marpaung and P. . Hotria Siregar, “THE RELATIONSHIP OF DAILY LIVING ACTIVITY (ADL) WITH ANXIETY LEVEL IN THE ELDERLY AT SOCIAL SERVICE UPT DEAF, SPEECH AND ELDERLY SOCIAL SERVICES PEMATANG SIANTAR”, IJEBAS, vol. 2, no. 1, pp. 57–62, Feb. 2022.