Silsbee, Steven, and Myles Grogan. “Developments in Ongoing English Classes Using Electronic Courseware for Multi-Level Repeaters”. The JALT CALL Journal 8, no. 3 (December 31, 2012): 243–252. Accessed September 29, 2026. https://www.castledown.com/journals/jaltcall/article/view/jaltcall.v8n3.144.