Hermanto, H., H. Muhartomo, A. Husni, M. I. Widiastuty, H. Suryawati, and A. P. Wati. “The Relationship Between Serum Folic Acid Levels With The Cognitive Function of The Elderly”. Medica Hospitalia : Journal of Clinical Medicine, vol. 10, no. 2, July 2023, pp. 198-02, doi:10.36408/mhjcm.v10i2.891.