DAVIS KEITH. (1981). HUMAN BEHAVIOUR AT WORK (6TH.). TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED.
Lua i Stíl Chicago (17ú heag.)DAVIS KEITH. HUMAN BEHAVIOUR AT WORK. 6TH. NEW DELHI: TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED, 1981.
Lua MLA (9ú heag.)DAVIS KEITH. HUMAN BEHAVIOUR AT WORK. 6TH. TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED, 1981.
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