Dumayanti, Helda, Risda Putri Indriani, Evita Nury Hariyanti, Rizhal Hendi Ristanto, and Mieke Miarsyah. 2022. “Two-Tier Test: Development of Critical Thinking Instruments for Ecosystem Concepts”. Phenomenon : Jurnal Pendidikan MIPA 12 (1):48-62. https://doi.org/10.21580/phen.2022.12.1.11829.