I. Murdifin, M. F. A. Pelu, A. A. H. P. K. Putra, A. M. Arumbarkah, M. Muslim, and A. Rahmah, “Environmental Disclosure as Corporate Social Responsibility: Evidence from the Biggest Nickel Mining in Indonesia”, IJEEP, vol. 9, no. 1, pp. 115–122, Dec. 2018.