Gaya APA

Elton, E, J., Gruber, M, J. (2011). Modern portfolio theory and investment analysis (8th. Ed.). Singapore: John Wiley & Sons.

Gaya MLA

Elton, Edwin, J.., Gruber, Martin, J.. "Modern portfolio theory and investment analysis". 8th. Ed. Singapore: John Wiley & Sons, 2011. Text.