McCrae, R. R., & Costa, P. T. (1987). Validation of the five-factor model of personality across instruments and observers

McCrae, R. R., & Costa, P. T. (1987). Validation of the five-factor model of personality across instruments and observers. Journal of Personality and Social Psychology, 52(1), 81-90. Retrieved from http://search.ebscohost.com/login.aspx?direct=true&db=pdh&AN=psp-52-1-81&site=ehost-live. doi:10.1037/0022-3514.52.1.81