Niccolò Machiavelli, Kahlil Gibran, P. T. Barnum, Marcus Aurelius, Wallace D. Wattles, Lao Tzu, Russell Conwell, Henry Harrison Brown, Florence Scovel Shinn, Émile Coué, Charles F. Haanel, Elbert Hubbard, B. F. Austin, Robert Collier, James Allen, William Walker Atkinson, Orison Swett Marden, Benjamin Franklin, William Crosbie Hunter, Harry A. Lewis, Thorstein Veblen
Niccolò Machiavelli, Kahlil Gibran, P. T. Barnum, Marcus Aurelius, Wallace D. Wattles, Lao Tzu, Russell Conwell, Henry Harrison Brown, Florence Scovel Shinn, Émile Coué, Charles F. Haanel, Elbert Hubbard, B. F. Austin, Robert Collier, James Allen, William Walker Atkinson, Orison Swett Marden, Benjamin Franklin, William Crosbie Hunter, Harry A. Lewis, Thorstein Veblen
Niccolò Machiavelli, Wallace D. Wattles, Lao Tzu, Russell Conwell, Henry Harrison Brown, Émile Coué, James Allen, William Walker Atkinson, Orison Swett Marden, Benjamin Franklin, Thorstein Veblen, Kahlil Gibran, P. T. Barnum, Marcus Aurelius
Niccolò Machiavelli, Kahlil Gibran, P. T. Barnum, Marcus Aurelius, Wallace D. Wattles, Lao Tzu, Russell Conwell, Henry Harrison Brown, Florence Scovel Shinn, Émile Coué, Charles F. Haanel, Elbert Hubbard, B. F. Austin, Robert Collier, James Allen, William Walker Atkinson, Orison Swett Marden, Benjamin Franklin, William Crosbie Hunter, Harry A. Lewis, Thorstein Veblen
Niccolò Machiavelli, Wallace D. Wattles, Lao Tzu, Russell Conwell, Henry Harrison Brown, Émile Coué, James Allen, William Walker Atkinson, Orison Swett Marden, Benjamin Franklin, Thorstein Veblen, Kahlil Gibran, P. T. Barnum, Marcus Aurelius