Helfert, E. A. (1997). Techniques of financial analysis: A modern approach (9thed.). Irwin.
Cita Chicago (17th ed.)Helfert, Erich A. Techniques of Financial Analysis: A Modern Approach. 9thed. Chicago: Irwin, 1997.
Cita MLA (9th ed.)Helfert, Erich A. Techniques of Financial Analysis: A Modern Approach. 9thed. Irwin, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.