Dodi Darmakusuma, et al. “UJI KETAHANAN LUNTUR SEDIAAN PEWARNA ALAMI BIRU TAHAN LUNTUR BTL-1 : Fade Resistance Test Of Blue Natural Colorant Preparation Fade-Resistant Btl-1 ”. SAINSTEK, vol. 7, no. 1, Jan. 2026, pp. 112-9, https://conference.undana.ac.id/sainstek/article/view/913.