Putri, Milani Agustina, et al. “Formulasi Dan Uji Mutu Fisik Sabun Padat Ekstrak Kulit Nanas (Ananas Comosus L.): Formulation and Physical Quality Test of Pineapple Peel Extract (Ananas Comosus L.) Solid Soap”. Proceeding of Mulawarman Pharmaceuticals Conferences, vol. 13, no. 1, Aug. 2021, pp. 275-81, doi:10.25026/mpc.v13i1.479.