“EFFECT OF METHANOL LEAF EXTRACT OF ORTHOSIPHON STAMINEUS BENTH. ON HEPATIC DRUG METABOLIZING ENZYMES IN SPRAGUE DAWLEY (SD) RATS”. 2008. Tropical Life Sciences Research 19 (1): 21–31. https://ejournal.usm.my/tlsr/article/view/tlsr_vol19-no-1-2008_3.