Tani, Jowy, Ivan R. Widjaja, Irwin Tedja, Irandi P. Pratomo, Ira Siagian, Indra Fahri, Zarni Amri, and Saptawati Bardosono. 2007. “Association Between Dietary Intake of Vitamin A, C, and E As Antioxidants and Cognitive Function in the Elderly at a Nursing Home”. Medical Journal of Indonesia 16 (4):261-6. https://doi.org/10.13181/mji.v16i4.289.