BERG, N. A. (1984). General Management An Analytical Aproach Norman A Berg. s.n.
Lua i Stíl Chicago (17ú heag.)BERG, Norman A. General Management An Analytical Aproach Norman A Berg. s.n, 1984.
Lua MLA (8ú heag.)BERG, Norman A. General Management An Analytical Aproach Norman A Berg. s.n, 1984.
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