Wahyu, Wahyu, Vandalita M. Rambitan, dan Daniel Daniel. 2020. “REQUIREMENTS ANALYSIS OF PROBLEM UNDERSTANDING OF BIOLOGICAL TEACHERS RELATED TO DEVELOPMENT OF CHARACTER EDUCATION BASED LEARNING”. IJER - INDONESIAN JOURNAL OF EDUCATIONAL REVIEW 7 (02):44-50. https://journal.unj.ac.id/unj/index.php/ijer/article/view/21703.