Sun Tzu, Lao Tzu, Plato, Marcus Aurelius, Niccolò Machiavelli, Thomas More, Thomas Paine, John Stuart Mill, Karl Marx, Vladimir Lenin & Peter Kropotkin
Napoleon Hill, George Samuel Clason, James Allen, Khalil Gibran, Sun Tzu, Lao Tzu, Confucius, Benjamin Franklin, Marcus Aurelius Antoninus, Russell H. Conwell, Ralph Waldo Emerson, Florence Scovel Shinn, Charles F. Haane, Wallace D. Wattles & Orison Swett Marden