ELTON, E. J., GRUBER, M. J., BROWN, S. J., & GOETZMANN, W. N. (2007). Modern portfolio theory and investment analysis (Ed.7.). John Wiley and Sons.

ELTON, Edwin J., Martin J. GRUBER, Stephen J. BROWN, and William N. GOETZMANN. Modern Portfolio Theory and Investment Analysis. Ed.7. New Jersey: John Wiley and Sons, 2007.

ELTON, Edwin J., et al. Modern Portfolio Theory and Investment Analysis. Ed.7. John Wiley and Sons, 2007.