Putra, D. P., N. Novelina, and A. Asben. “Stability and Toxicity Test of Angkak Pigment Powder from Sago Hampas- Rice Flour Substrate As Natural Dyes”. Journal of Applied Agricultural Science and Technology, vol. 5, no. 1, Mar. 2021, pp. 38-49, doi:10.32530/jaast.v5i1.9.