Venessa, Devita Marlina Marlina, et al. “Collaborative Project-Based Learning With Eco-Friendly Product Theme: Improving Students’ Conceptual Understanding of Basic Chemical Laws”. SAINTIFIK@: Jurnal Pendidikan MIPA, vol. 11, no. 1, Mar. 2026, pp. 53-63, doi:10.33387/saintifik.v11i1.11124.