Plane, D. R., & Oppermann, E. B. (1977). Statistics for management decisions. Business Pub.
Lua i Stíl Chicago (17ú heag.)Plane, Donald R., agus Edward B. Oppermann. Statistics for Management Decisions. Dallas: Business Pub, 1977.
Lua MLA (9ú heag.)Plane, Donald R., agus Edward B. Oppermann. Statistics for Management Decisions. Business Pub, 1977.
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