Ciptono, W. S., A. R. Ibrahim, A. Sulaiman, and S. L. S. A. Kadir. “Sustainability of TQM Implementation Model In The Indonesia’s Oil and Gas Industry: An Assessment of Structural Relations Model Fit”. Gadjah Mada International Journal of Business, Vol. 13, no. 1, Feb. 2011, pp. 1-20, https://dev.journal.ugm.ac.id/v3/gamaijb/article/view/15303.