Khalil Gibran, Napoleon Hill, George S. Clason, Benjamin Franklin, Florence Scovel Shinn, Wallace D. Wattles, James Allen, William Walker Atkinson, Russell H. Conwell, P.T. Barnum, B.F. Austin, L.W. Rogers
Khalil Gibran, Napoleon Hill, Orison Swett Marden, Benjamin Franklin, Florence Scovel Shinn, Wallace D. Wattles, James Allen, Russell H. Conwell, P.T. Barnum