Yamada, Masanori, Satoshi Kitamura, Noriko Shimada, Takafumi Utashiro, Katsusuke Shigeta, Etsuji Yamaguchi, Richard Harrison, and Yuhei Yamauchi. “Development and Evaluation of English Listening Study Materials for Business People Who Use Mobile Devices: A Case Study”. CALICO Journal 29, no. 1 (January 14, 2013): 44–66. Accessed July 16, 2024. https://journal.equinoxpub.com/Calico/article/view/17066.