Marsh, H. W., Lüdtke, O., Muthén, B., Asparouhov, T., Morin, A. J. S., Trautwein, U., et al. (2010). A new look at the Big Five factor structure through exploratory structural equation modeling. Psychological Assessment, 22(3), 471-491. doi:10.1037/a0019227.