HARWOOD GORDON B. (1979). SELF REVIEW IN QUANTITATIVE METHODS (2ND.). RICHARD D.IRWIN INC.
Lua i Stíl Chicago (17ú heag.)HARWOOD GORDON B. SELF REVIEW IN QUANTITATIVE METHODS. 2ND. ILLIONS: RICHARD D.IRWIN INC, 1979.
Lua MLA (9ú heag.)HARWOOD GORDON B. SELF REVIEW IN QUANTITATIVE METHODS. 2ND. RICHARD D.IRWIN INC, 1979.
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