Swier, Robert, and Mark Peterson. “3D Digital Games, Virtual Worlds, and Language Learning in Higher Education: Continuing Challenges in Japan”. The JALT CALL Journal 14, no. 3 (December 31, 2018): 225–238. Accessed September 22, 2026. https://www.castledown.com.au/journals/jaltcall/article/view/jaltcall.v14n3.j232.