Khulliyah, Khulliyah, and Andi Fadlan. “Penguasaan Konsep Dan Retensi Melalui Pogil (Process Oriented Guided Inquiry Learning) Bermuatan Multiple Level Representation”. Journal of Educational Chemistry (JEC), vol. 1, no. 1, July 2019, pp. 36-43, doi:10.21580/jec.2019.1.1.3942.