O'Shanghnessy, J. (1966). Business Organization J. O'shanghnessy. George Allen & Unwin Ltd.
Lua i Stíl Chicago (17ú heag.)O'Shanghnessy, J. Business Organization J. O'shanghnessy. George Allen & Unwin Ltd, 1966.
Lua MLA (8ú heag.)O'Shanghnessy, J. Business Organization J. O'shanghnessy. George Allen & Unwin Ltd, 1966.
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