Helfert, E. (1987). Techniques of financial analysis (6th.). Universal Book Stall.
Cita Chicago (17th ed.)Helfert, Erich. Techniques of Financial Analysis. 6th. New Delhi: Universal Book Stall, 1987.
Cita MLA (9th ed.)Helfert, Erich. Techniques of Financial Analysis. 6th. Universal Book Stall, 1987.
Atenció: Aquestes cites poden no estar 100% correctes.