Riris, et al. “Effect of Application of Team Assisted Individualization of Biology Learning Model Of Student Interest in the Pteridophyta Material at SMAN 39 Jakarta”. Biosfer: Jurnal Pendidikan Biologi, vol. 7, no. 1, Jan. 2018, pp. 37-42, doi:10.21009/biosferjpb.7-1.6.