Idha Silviyati, Hilwatullisan, Rusdianasari, A. Mujiyanti, and H. S. Nainggolan. “Characteristics of Eco-Friendly Marker Ink by Utilizing Natural Dyes From Noni Leaf Extract (Morinda Citrifolia L.)”. International Journal of Research in Vocational Studies (IJRVOCAS), vol. 4, no. 1, Apr. 2024, pp. 35-39, doi:10.53893/ijrvocas.v4i1.268.