Nurfitriani, A.; Mahendradatta, M.; Laga, A.; Zainal, .-. The Terpenoid Activity of Ethanol Extracted from Purple Yam Sap to Inhibit the Growth of R. Oligosporus and S. Cerevisiae. Int. J. Adv. Sci. Eng. Inf. Technol. 2021, 11, 1618-1622.