Wahyudi, S., H. Hersugondo, R. D. Laksana, and R. Rudy. “Macroeconomic Fundamental and Stock Price Index in Southeast Asia Countries A Comparative Study”. International Journal of Economics and Financial Issues, vol. 7, no. 2, Apr. 2017, pp. 182-7, https://www.econjournals.com/index.php/ijefi/article/view/3466.