Nofrion, Nofrion, et al. “Analisis Technological Pedagogical and Content Knowledge (TPACK) Guru Geografi Di Kabupaten Solok, Sumatera Barat”. JURNAL GEOGRAFI, vol. 10, no. 2, Aug. 2018, pp. 105-16, doi:10.24114/jg.v10i2.9070.