Aminati, S., and G. Purwiandono. “Enhancing Learning Interest in the Collaborative Learning Practitioner Lecture: Training on Determining the Viscosity of Palm Kernel Oil (PKO)”. IJCER (International Journal of Chemistry Education Research), vol. 8, no. 2, Oct. 2024, pp. 166-71, doi:10.20885/ijcer.vol8.iss2.art10.