Sri Tami Ningsih Daulay, et al. “GRADE 10 STUDENTS’ DIFFICULTIES IN CLASSIFYING LIVING THINGS USING DETERMINATION KEYS AT SMAN 1 RANTAU SELATAN”. Akrab Juara : Jurnal Ilmu-Ilmu Sosial, vol. 10, no. 4, Nov. 2025, pp. 1188-00, https://akrabjuara.com/index.php/akrabjuara/article/view/2587.