Ramadhan, Gumintang Ratna, Sri Anna Marliyati, and Lilik Kustiyah. “Effect of Feeding Street Foods Containing Coconut Palm Sugar Enriched With Red Palm Oil (RPO) on Serum Retinol Level and Nutritional Status of Elementary School Children”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 29, no. 1 (August 15, 2016): 279–288. Accessed May 18, 2024. https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/6049.