AzizSandra Arifin, Munif Ghulamahdi, and Andria Afrida. 2012. “The Effect of Phosphorous Fertilization on Indian Pennyworth (Centella Asiatica L. Urban) in High Altitude”. Jurnal Hortikultura Indonesia (JHI) 2 (1), 1-5. https://doi.org/10.29244/jhi.2.1.1-5.