Huang, Junjun, and Zhang Ye. “Analysis of Factors That Influenced the Participation Rates in Upper-Secondary Vocational Schools in China”. Journal of Technical Education and Training, vol. 13, no. 2, Jan. 2021, pp. 115-26, https://penerbit.uthm.edu.my/ojs/index.php/JTET/article/view/7358.