Firda, Arlian. “ANALISIS KESULITAN BELAJAR SISWA SMA PADA MATERI KULTUR JARINGAN TUMBUHAN”. Bio-Lectura 6, no. 1 (April 25, 2019): 73-77. Accessed September 18, 2019. https://journal.unilak.ac.id/index.php/BL/article/view/2694.