“KANDUNGAN LOGAM BERAT DALAM TUMBUHAN PERISA (HALIA DAN SERAI) YANG DITANAM DALAM TANAH ULTRABES DI RANAU, SABAH, MALAYSIA: HEAVY METAL CONTENT IN FLAVORING PLANTS (GINGER AND LEMONGRASS) GROWN IN ULTRABASE SOIL IN RANAU, SABAH, MALAYSIA”. Jurnal Teknologi (Sciences & Engineering), vol. 88, no. 3, Apr. 2026, pp. 385-93, https://doi.org/10.11113/jurnalteknologi.v88.23690.