Miller, J. D., Few, L. R., Wilson, L., Gentile, B., Widiger, T. A., Mackillop, J., & Campbell, K. (2013). The Five-Factor Narcissism Inventory (FFNI): a test of the convergent, discriminant, and incremental validity of FFNI scores in clinical and community samples. Psychological Assessment, 25(3), 748-58. https://doi.org/10.1037/a0032536