PERRY WILLIAM E. (1982). HOW TO MANAGE MANAGEMENT. JAICO PUBLISHING HOUSE.
Lua i Stíl Chicago (17ú heag.)PERRY WILLIAM E. HOW TO MANAGE MANAGEMENT. BOMBAY: JAICO PUBLISHING HOUSE, 1982.
Lua MLA (9ú heag.)PERRY WILLIAM E. HOW TO MANAGE MANAGEMENT. JAICO PUBLISHING HOUSE, 1982.
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