O`KEEFFE JOHN. (2005). BUSINESS BEYOND THE BOX. MAGNA PUBLISHING CO LTS.
Lua i Stíl Chicago (17ú heag.)O`KEEFFE JOHN. BUSINESS BEYOND THE BOX. MUMBAI: MAGNA PUBLISHING CO LTS, 2005.
Lua MLA (9ú heag.)O`KEEFFE JOHN. BUSINESS BEYOND THE BOX. MAGNA PUBLISHING CO LTS, 2005.
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