Sunaryo, Deni. “Stock Return Problems In The Coal Sector: A Case Study Of The Use Of Price Earning Ratio And Firm Size Moderation”. Asean International Journal of Business 1, no. 2 (July 26, 2022): 104–123. Accessed May 4, 2024. http://journal.adpebi.com/index.php/AIJB/article/view/139.