APA استشهاد

Elton, E. J., & Gruber, M. J. (1994). Modern portfolio theory and investment analysis (4th ed.). John Wiley.

استشهاد بنمط شيكاغو

Elton, Edwin J., و Martin J. Gruber. Modern Portfolio Theory and Investment Analysis. 4th ed. Singapore: John Wiley, 1994.

MLA استشهاد

Elton, Edwin J., و Martin J. Gruber. Modern Portfolio Theory and Investment Analysis. 4th ed. John Wiley, 1994.