Septriardy, D.A. 2017. Peningkatan Kualitas Supply Chain Material Melalui Teknologi Material Traceability System di PT. Pertamina Gas Eastern Java Area Operation. Journal of Earth Energy Engineering. 6, 1 (Apr. 2017), 11–29. DOI:https://doi.org/10.22549/jeee.v6i1.626.