Firmansyah, A., I. . Fauzi, M. I. . Hannun, D. K. Prakosa, and A. J. . Purwaka. “Are Market Competition, Customer Concentration and Company Diversification Associated With Firm Value?”. Journal of Contemporary Accounting, vol. 6, no. 1, Feb. 2024, pp. 11-26, doi:10.20885/jca.vol6.iss1.art2.