J. M. Simanjuntak, A. H. Manurung, N. M. Machdar, J. E. FoEH, and J. Sinaga, “Internal and External Factors on Cost Capital of Apparel and Luxury Goods Companies in Indonesia Stock Exchange”, Jurnal Ekonomi dan Bisnis Jagaditha, vol. 12, no. 2, pp. 269–278, Sep. 2025.