Haugen, R. A. (1987). Introductory investment theory. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Haugen, Robert A. Introductory Investment Theory. Englewood Cliffs, N.J: Prentice-Hall, 1987.
Lua MLA (9ú heag.)Haugen, Robert A. Introductory Investment Theory. Prentice-Hall, 1987.
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