Aini, Nisa Qurrata, et al. “Development of Electronic Portfolios to Assess Concept Mastery and Creative Thinking on Project-Based Acid-Based Concepts”. Jurnal Pendidikan Kimia, vol. 16, no. 3, Dec. 2024, pp. 278 – 284, doi:10.24114/jpkim.v16i3.65188.