Pengembangan Four-tier Diagnostic Test Konsep Ekosistem: Validitas dan Reliabilitas instrumen: Four-tier Diagnostic Test Instrument for Ecosystem Concept : Validity and Reliability. Biodik [Internet]. 2020Mar.1 [cited 2024Jul.4];6(1):1-11. Available from: https://online-journal.unja.ac.id/biodik/article/view/8093