Mohd Norfaizal Ghazalli, Muhammad Shafie Md Sah, Mazidah Mat, Khadijah Awang, Mohd Azwan Jaafar, Razali Mirad, Ahmad Zaki Zaini, et al. “Leaf Anatomy and Micromorphology Characteristics of Ketum [Mitragyna Speciosa (Korth.) Havil.] (Rubiaceae)”. Tropical Life Sciences Research 32, no. 1 (March 31, 2021): 107–117. Accessed April 20, 2025. https://ejournal.usm.my/tlsr/article/view/tlsr_vol32-no-1-2021_7.