Pungky Eka Setyawan, Elta Sonalitha, Didit Abryanto Asmono, and Rifki Akbar Refitra. “Investigation of the Effect of Anodizing Dyes Using Purple Cabbage and Dragon Fruit Peel on Aluminum 6061 Alloy”. International Journal of Advances in Scientific Research and Engineering (IJASRE), ISSN:2454-8006, DOI: 10.31695/IJASRE 7, no. 2 (February 25, 2021): 15–27. Accessed June 22, 2024. https://www.ijasre.net/index.php/ijasre/article/view/1199.