Khofifah, Utami, Jujun Ratnasari, and Aa Juhanda. (2020) 2020. “Analisis Butir Soal Kemampuan Tree Thinking Pada Instrumen Uji Coba Materi Spermathophyta: (Analysis of Tree Thinking Ability Problem Ability in Spermathophyta Trial Material Instruments)”. BIODIK 6 (3):328-35. https://doi.org/10.22437/bio.v6i3.9907.