Sukamat, Azlan, and Abdul Aziz Zalay @ Zali. “Preliminary Studies and Pilot Testing to Implement Blended Learning Approach in Learning 3D Drawing for Secondary School Students”. KUPAS SENI: Jurnal Seni Dan Pendidikan Seni, vol. 6, Sept. 2018, pp. 80-88, https://doi.org/10.37134/kupasseni.vol6.8.2018.