APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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