Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.