Ying, L. F. ., L. C. . Lung, L. F. . Chiat, and T. F. . Hee. “Preferences in Musical Elements in Ringtone Selection: Comparison Between Music and Non-Music Undergraduate Student”. International Journal of Asian Social Science, vol. 3, no. 4, Apr. 2013, pp. 913-20, https://archive.aessweb.com/index.php/5007/article/view/2464.