Gaya APA

Elton, E, J., Gruber, M, J. (1981). Modern Portofolio Theory and Investment Analysis (5). Amerika: John Wiley And Sons.

Gaya MLA

Elton, Edwin, J.., Gruber, Martin, J.. "Modern Portofolio Theory and Investment Analysis". 5 Amerika: John Wiley And Sons, 1981. Text.