Gifford, J. (2010). History lessons: What business management can learn from the great leaders of history. Marshall Cavendish Business.
Chicago-referens (17:e uppl.)Gifford, Jonathan. History Lessons: What Business Management Can Learn from the Great Leaders of History. London: Marshall Cavendish Business, 2010.
MLA-referens (9:e uppl.)Gifford, Jonathan. History Lessons: What Business Management Can Learn from the Great Leaders of History. Marshall Cavendish Business, 2010.
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