Sari, Yolanda Holinda, Rusdi Rusdi, and Sri Rahayu. “Effect of Hypnoteaching Methods Toward Cognitive Learning Outcomes to Nervous System Subject in SMAN 97 Jakarta”. Biosfer: Jurnal Pendidikan Biologi 8, no. 2 (January 17, 2018): 46-54. Accessed August 26, 2019. http://journal.unj.ac.id/unj/index.php/biosfer/article/view/5591.