Hutagalung, M., and L. Aldianto. “The Challenge Of Implementation Indonesia Industry 4.0 Readiness Index (Indi 4.0) In Infrastructure Company Case Study: At Pt. Hutama Karya (Persero)”. Eduvest - Journal of Universal Studies, vol. 4, no. 10, Oct. 2024, pp. 9442-64, doi:10.59188/eduvest.v4i10.1372.