Insani, N., Fadiawati, N., Rudibyani, R.B. and Fauzi Syamsuri, M.M. 2018. Using Project-Based Learning in Improving Students’ Critical Thinking Skills to Separate of Mixtures. IJCER (International Journal of Chemistry Education Research). 2, 2 (Aug. 2018), 84–88. DOI:https://doi.org/10.20885/ijcer.vol2.iss2.art5.