LEVIN RICHARD I. (1983). STATISTICS FOR MANAGEMENT. PEARSON EDUCATION.
Lua i Stíl Chicago (17ú heag.)LEVIN RICHARD I. STATISTICS FOR MANAGEMENT. DELHI: PEARSON EDUCATION, 1983.
Lua MLA (9ú heag.)LEVIN RICHARD I. STATISTICS FOR MANAGEMENT. PEARSON EDUCATION, 1983.
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