APA
Elton Edwin J, Gruber Martin J, . (2001). Modern portfolio theory and investment analysis. Singapore: John Wiley & Sons.
Chicago
Elton Edwin J, Gruber Martin J, . 2001. Modern portfolio theory and investment analysis. Singapore: John Wiley & Sons.
Harvard
Elton Edwin J, Gruber Martin J, . (2001). Modern portfolio theory and investment analysis. Singapore: John Wiley & Sons.
MLA
Elton Edwin J, Gruber Martin J, . Modern portfolio theory and investment analysis. Singapore: John Wiley & Sons. 2001.