Lua APA (7ú heag.)

HELFERT ERICH A. (1992). TECHNIQUES OF FINANCIAL ANALYSIS. JAICO PUBLISHING HOUSE.

Lua i Stíl Chicago (17ú heag.)

HELFERT ERICH A. TECHNIQUES OF FINANCIAL ANALYSIS. MUMAI: JAICO PUBLISHING HOUSE, 1992.

Lua MLA (9ú heag.)

HELFERT ERICH A. TECHNIQUES OF FINANCIAL ANALYSIS. JAICO PUBLISHING HOUSE, 1992.

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