HELFERT ERICH A. (1972). TECHNIQUES OF FINANCIAL ANALYSIS (3RD.). RICHARD D.IRWIN INC.
Chicago Style aipamenaHELFERT ERICH A. TECHNIQUES OF FINANCIAL ANALYSIS. 3RD. HOMEWOOD: RICHARD D.IRWIN INC, 1972.
MLA aipamenaHELFERT ERICH A. TECHNIQUES OF FINANCIAL ANALYSIS. 3RD. RICHARD D.IRWIN INC, 1972.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.