Sunarjo, Jonathan, et al. “PEMBUATAN GAME 2D ONLINE CROSS-PLAY MULTIPLAYER CO-OP PLATFORMER ‘SHAPE SURVIVOR’”. Jurnal Ilmu Komputer Dan Sistem Informasi, vol. 9, no. 1, Jan. 2021, pp. 142-7, doi:10.24912/jiksi.v9i1.11585.