HAUGEN, R. A. (1993). Modern Investment Theory Robert A Haugen. Prentice - Hall.
Lua i Stíl Chicago (17ú heag.)HAUGEN, Robert A. Modern Investment Theory Robert A Haugen. Prentice - Hall, 1993.
Lua MLA (8ú heag.)HAUGEN, Robert A. Modern Investment Theory Robert A Haugen. Prentice - Hall, 1993.
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