Buana, R. T., and A. K. Putra. “Peningkatan Kemampuan Berpikir Spasial: Implementasi Model Problem Based Learning Melalui Pendekatan Self Efficacy Berbantuan WebGIS Inarisk”. Journal of Education Action Research, vol. 7, no. 3, Aug. 2023, pp. 310-9, doi:10.23887/jear.v7i3.63881.