ABA's Center for Professional Responsibility

Association of Professional Responsibility Lawyers

Crossing the Bar (Multijurisdictional Practice of Law)

Duke University School of Law Library – Legal Ethics Research Guide

ETHICSearch (ABA Ethics Research Service)

FindLaw: Ethics and Professional Responsibility

The Georgetown Journal of Legal Ethics

Geoffrey C. Hazard and W. William Hodes, The Law of Lawyering: A Handbook on the Model Rules of Professional Conduct (2d ed., 1990)

LegalEthics.com (Internet Legal Services)

LII American Legal Ethics Library

National Client Protection Organization Inc.

National Organization of Bar Counsel

Thomas E. Spahn, A Practitioner's Guide to the Attorney-Client Privilege and the Work Product Doctrine (2001)

Washington University School of Law Library – Legal Ethics Research Guide

Westlaw's databases of METH-CS (case law on ethics issues from all 50 states) and METH-EO (multistate ethics opinions for available states)

Charles W. Wolfram, Modern Legal Ethics (1986)