ManurungE. Batara, Hermanto Siregar, and SaptonoImam Teguh. “FACTORS AFFECTING TOBIN’S Q COAL MINING COMPANY REGISTERED IN INDONESIA STOCK EXCHANGE”. Indonesian Journal of Business and Entrepreneurship (IJBE) 2, no. 2 (May 27, 2016): 130. Accessed April 26, 2024. https://journal.ipb.ac.id/index.php/ijbe/article/view/13059.