Wirmasari, Ranny, and Mayta Novaliza Isda. 2019. “In Vitro Response of Protocorm Grammatophyllum Stapeliiflorum (Teijsm. & Binn.) J.J.Sm. Orchid in Growth on Several Media Composition”. Jurnal Biologi UNAND 7 (2):118-25. https://doi.org/10.25077/jbioua.7.2.118-125.2019.