by Gerald of Gerald of Wales, John O'Meara, Gerald of Wales
by Jack C. McCormac, William Davis, Wayne Sarasua
by Jerry Nathanson, Michael Lanzafama, Philip Kissam
by MurphyRaymond, William R. Smalzer, Joseph Chapple
by Robert Cialdini
by Wesley G. Crawford
by Gurdon H. Wattles
by Jan Van Sickle
by K'wan