M. Faisal, Asri Gani, Husni, and Hiroyuki Daimon. 2016. “A PRELIMINARY STUDY OF THE UTILIZATION OF LIQUID SMOKE FROM PALM KERNEL SHELLS FOR ORGANIC MOUTHWASH”. GEOMATE Journal 13 (37):116-20. https://geomatejournal.com/geomate/article/view/1552.