Hendri Faisal (trans.) (2022) “Analysis of Vitamin C Levels and Evaluation of Effervescent Tablets Mixture of Ethanol Extract of Red Guava Seeds and White Guava Seeds (Psidium Guajava L.)”, Jurnal Indah Sains dan Klinis, 3(1), pp. 1–7. doi:10.52622/jisk.v3i1.40.