St. John, N. (2009). The secret code of success: 7 hidden steps to more wealth and happiness (EPub edition.). HarperCollins.
Style de citation Chicago (17e éd.)St. John, Noah. The Secret Code of Success: 7 Hidden Steps to More Wealth and Happiness. EPub edition. New York: HarperCollins, 2009.
Style de citation MLA (8e éd.)St. John, Noah. The Secret Code of Success: 7 Hidden Steps to More Wealth and Happiness. EPub edition. HarperCollins, 2009.
Attention : ces citations peuvent ne pas être correctes à 100%.