Utami, W. R., S. Hartoyo, and T. N. A. Maulana. “The Effect of Internal and External Factors on Stock Return: Empirical Evidence from the Indonesian Construction Subsector”. Asian Journal of Business and Management, vol. 3, no. 5, Oct. 2015, https://ajouronline.com/index.php/AJBM/article/view/3167.