Berosil, K. E. S., L. A. A. Gayo, J. J. Taawan, M. D. Paz, A. Bingcang, J. Rodriguez, and J. Balila. “Development of Hand and Body Liquid Soap from Polyalthia Longifolia (Sonn) Thwaites (Mast Tree) Leaf Extracts”. 11th International Scholars Conference, vol. 5, no. 1, Oct. 2017, p. 24, doi:10.35974/isc.v5i1.1455.