M. Meilinda and J. Sapri, “APPLICATION OF COOPERATIVE LEARNING MODEL BASED ON ENVIRONMENT TO IMPROVE SOFT SKILLS AND LEARNING ACHIEVEMENTS (Study in Student Biology Subjects Class X at SMK Negeri 4 Lebong)”, Diadik j. ilm. teknol. pendidik., vol. 9, no. 1, pp. 136–146, Sep. 2021.