Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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