CARVELL FRED J. (1975). HUMAN RELATIONS IN BUSINESS (2.). MACMILLAN.
Lua i Stíl Chicago (17ú heag.)CARVELL FRED J. HUMAN RELATIONS IN BUSINESS. 2. NEW YORK: MACMILLAN, 1975.
Lua MLA (9ú heag.)CARVELL FRED J. HUMAN RELATIONS IN BUSINESS. 2. MACMILLAN, 1975.
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