KROLL STANLEY. (1974). PROFESSIONAL COMMODITY TRADER. TRADERS PRESS.
Lua i Stíl Chicago (17ú heag.)KROLL STANLEY. PROFESSIONAL COMMODITY TRADER. GREENVILLE: TRADERS PRESS, 1974.
Lua MLA (9ú heag.)KROLL STANLEY. PROFESSIONAL COMMODITY TRADER. TRADERS PRESS, 1974.
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