Lua APA (7ú heag.)

LEVIN RICHARD I. (1979). STATISTICS FOR MANAGEMENT. PRENTICE HALL.

Lua i Stíl Chicago (17ú heag.)

LEVIN RICHARD I. STATISTICS FOR MANAGEMENT. INDIA NEW DLHI: PRENTICE HALL, 1979.

Lua MLA (9ú heag.)

LEVIN RICHARD I. STATISTICS FOR MANAGEMENT. PRENTICE HALL, 1979.

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