Susilaningtyas, Y., and M. B. Musthofa. “Implementation of Cooperative Learning Treffinger Type to Improve the Understanding of Class VI Students”. Pedagogi: Jurnal Ilmu Pendidikan, Vol. 21, no. 2, Nov. 2021, pp. 107-13, doi:https://doi.org/10.24036/pedagogi.v21i2.1073.