Helfert, E. A. (1991). Techniques of financial analysis (7th ed.). Jaico.
Chicago Style aipamenaHelfert, Erich A. Techniques of Financial Analysis. 7th ed. Bombay: Jaico, 1991.
MLA aipamenaHelfert, Erich A. Techniques of Financial Analysis. 7th ed. Jaico, 1991.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.