Febriana, D., J. Juanita, and N. Nurhasanah. “Psychometric Evaluation of Instruments Measuring The Older Adult’s Functional Status in Indonesian”. Jurnal Keperawatan Padjadjaran, vol. 7, no. 2, July 2019, pp. 134-42, doi:10.24198/jkp.v7i2.840.