Heifert, E. A. (1982). Techniques of financial analysis. Richard D. Irwin.
Lua i Stíl Chicago (17ú heag.)Heifert, Erich A. Techniques of Financial Analysis. Richard D. Irwin, 1982.
Lua MLA (8ú heag.)Heifert, Erich A. Techniques of Financial Analysis. Richard D. Irwin, 1982.
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