LEVIN, R. l., KIRKPATRICK, C. A., & RUBIN, D. S. Quantitative approaches to management.-- Ed.4. McGraw-Hill International ,1984.
Lua i Stíl Chicago (17ú heag.)LEVIN, Richard l., Charles A. KIRKPATRICK, agus David S. RUBIN. Quantitative Approaches to Management.-- Ed.4. Auckland: McGraw-Hill International ,1984.
Lua MLA (9ú heag.)LEVIN, Richard l., et al. Quantitative Approaches to Management.-- Ed.4. McGraw-Hill International ,1984.
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