Tarigan, Rida Evalina, et al. “Advanced UV Spectrophotometry-Classical Least Squares Determination of Paracetamol, Phenylpropanolamine HCl, and Chlorpheniramine Maleate in Tablet Dosage Form ”. International Journal of Science, Technology & Management, vol. 5, no. 4, July 2024, pp. 985-90, doi:10.46729/ijstm.v5i4.1150.