Citazione Stile APA (7a Edizione)

ELTON, E. J., & GRUBER, M. J. (1991). Modern portopolio theory and investment analysis.--ed.4. John Wiley and Sons.

Citazione stile Chigago Style (17a edizione)

ELTON, Edwin J., e Martin J. GRUBER. Modern Portopolio Theory and Investment Analysis.--ed.4. New York: John Wiley and Sons, 1991.

Citatione MLA (9a ed.)

ELTON, Edwin J., e Martin J. GRUBER. Modern Portopolio Theory and Investment Analysis.--ed.4. John Wiley and Sons, 1991.