Cita APA (7th ed.)

Elton, E. J., & Gruber, M. J. (1981). Modern portfolio theory and investment analysis. John Wiley & Sons.

Cita Chicago (17th ed.)

Elton, Edwin J., i Martin Jay Gruber. Modern Portfolio Theory and Investment Analysis. Nueva York: John Wiley & Sons, 1981.

Cita MLA (9th ed.)

Elton, Edwin J., i Martin Jay Gruber. Modern Portfolio Theory and Investment Analysis. John Wiley & Sons, 1981.