Robbins, S. P. (1999). Management (6th ed.). Prentice hall.
Lua i Stíl Chicago (17ú heag.)Robbins, Stephen P. Management. 6th ed. New Jersey: Prentice hall, 1999.
Lua MLA (9ú heag.)Robbins, Stephen P. Management. 6th ed. Prentice hall, 1999.
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