Ahmad Yani , David, and Agung Rachmadi Rachmadi. 2017. “The Influence Of Costumer Contracts And Effectiveness Of Infrastructure Facilities Revenue PT. PLN (Persero) Area Tanjungkarang”. Jurnal Relevansi : Ekonomi, Manajemen Dan Bisnis 1 (1):102-16. https://doi.org/10.61401/relevansi.v1i1.15.