Effendy De Lux Putra, et al. “Simultaneous Quantification of B-Complex Vitamins in Tablet Dosage Form by Ultraviolet Spectrophotometry Using the Absorption Factor Method”. Journal of Natural Sciences and Mathematics Research, vol. 11, no. 1, June 2025, pp. 84-91, doi:10.21580/jnsmr.v11i1.26111.