Abner Bayley, B.f. Austin, Charles F. Haanel, Dale Carnegie, Douglas Fairbanks, Florence Scovel Shinn, H.a. Lewis, Henry H. Brown, Henry Thomas Hamblin, James Allen, Lao Tzu, L.w. Rogers, Orison Swett Marden, P.t. Barnum, Ralph Waldo Emerson, Russell H. Conwell, Samuel Smiles, Sun Tzu, Various Authors, Wallace D. Wattles, William Atkinson, William Crosbie Hunter