Helfert, E. A. (1988). Techniques of financial analysis (6.). Universal Book Stall.
Chicago Style aipamenaHelfert, Enrich A. Techniques of Financial Analysis. 6. New Delhi: Universal Book Stall, 1988.
MLA aipamenaHelfert, Enrich A. Techniques of Financial Analysis. 6. Universal Book Stall, 1988.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.