APA (7th ed.) Zitazioa
Helfert, E. A. (1997). Techniques of financial analysis: A practical guide to managing and measuring business performance (9th ed.). Irwin McGraw Hill.
Chicago Style (17th ed.) Zitazioa
Helfert, Erich A. Techniques of Financial Analysis: A Practical Guide to Managing and Measuring Business Performance. 9th ed. Chicago: Irwin McGraw Hill, 1997.
MLA (9th ed.) Zitazioa
Helfert, Erich A. Techniques of Financial Analysis: A Practical Guide to Managing and Measuring Business Performance. 9th ed. Irwin McGraw Hill, 1997.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.