GRIFFIN, R. W. (1984). Management.-- ed.1 and 2. Houghton Mifflin Co.
Lua i Stíl Chicago (17ú heag.)GRIFFIN, Ricky W. Management.-- Ed.1 and 2. Boston: Houghton Mifflin Co, 1984.
Lua MLA (9ú heag.)GRIFFIN, Ricky W. Management.-- Ed.1 and 2. Houghton Mifflin Co, 1984.
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