Gaya APA

al.], E, J, E, [. (2014). Modern portfolio theory and investment analysis (9th ed.). New York: JohnWiley & Sons, Inc..

Gaya MLA

al.], Edwin, J., Elton, [et. "Modern portfolio theory and investment analysis". 9th ed. New York: JohnWiley & Sons, Inc., 2014. e-book.