Nurfitriani, A., Meta Mahendradatta, Amran Laga, and - Zainal. 2021. “The Terpenoid Activity of Ethanol Extracted from Purple Yam Sap to Inhibit the Growth of R. Oligosporus and S. Cerevisiae”. International Journal on Advanced Science, Engineering and Information Technology 11 (4):1618-22. https://doi.org/10.18517/ijaseit.11.4.12336.