Book Cases and Materials on Torts (5th ed.) Authors: David A Anderson, William C Powers Jr., David W Robertson, Olin G Wellborn III Full Citation David W. Robertson, William C. Powers Jr., David A. Anderson, Olin G. Wellborn, Cases and Materials on Torts (West Academic, 5th ed. 2017, 4th ed. 2011, 3d ed. 2004, 2d ed. 1998).