Professional responsibility : problems and materials / Thomas D. Morgan, Oppenheim Professor of Law Emeritus, the George Washington University ; Ronald D. Rotunda, the Doy & Dee Henley Chair, and Distinguished Professor of Jurisprudence, the Dale E. Fowler School of Law, Chapman University ; John S. Dzienkowski, Dean John F. Sutton, Jr. Chair in Lawyering and the Legal Process, the University of Texas.