LEVIN, R. I. (1982). Quantitative Approaches To Management Richard I. Levin ; Charles A. Kirkpatrick ; David S. Rubin. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)LEVIN, Richard I. Quantitative Approaches To Management Richard I. Levin ; Charles A. Kirkpatrick ; David S. Rubin. McGraw-Hill, 1982.
Lua MLA (8ú heag.)LEVIN, Richard I. Quantitative Approaches To Management Richard I. Levin ; Charles A. Kirkpatrick ; David S. Rubin. McGraw-Hill, 1982.
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