Sumarmi, S., Wahyuningtyas, N. ., Sahrina, A. ., & Aliman, M. . (2022). The effect of environmental volunteer integrated with service learning (EV_SL) to improve student’s environment care attitudes and soft skills. Pegem Journal of Education and Instruction, 12(1), 168–176. https://doi.org/10.47750/pegegog.12.01.16