Purbaningtias, T. E., Wiyantoko, B., Kurniawati, P. and Sari, M. K. (2014) “Decreasing in Acid Number of Patchouli Oil by Different Natural Adsorbent and Variation of Contact Time”, EKSAKTA: Journal of Sciences and Data Analysis, 14(1), pp. 27–33. Available at: https://jurnal.uii.ac.id/Eksakta/article/view/6019 (Accessed: 2 May 2024).