Welch, Michael (2010) "War on Terror as Crusade." Encyclopedia of Religion and Violence , Jeffrey Ian Ross (Editor). M.E. Sharpe.

Welch, Michael (2009) "No Fly Lists." Encyclopedia of Race and Crime, Shaun L. Gabbidon and Helen Taylor Greene (Editors), Thousand Oaks, California: Sage Publications.

Welch, Michael (2007) "Asylum." Encyclopedia of Social Probems, Vincent N. Parrillo (Editor). Thousand Oaks, California: Sage Publications.

Welch, Michael (2006) "Anti-Immigrant Politics." Encyclopedia of Activism and Social Justice, Gary L. Anderson and Kathryn Herr (Editors). Thousand Oaks, California: Sage Publications.

Welch, Michael (2006) "Attica Uprising." Encyclopedia of Activism and Social Justice, Gary L. Anderson and Kathryn Herr (Editors). Thousand Oaks, California: Sage Publications.

Welch, Michael (2006) "Moral Panic." Encyclopedia of Activism and Social Justice, Gary L. Anderson and Kathryn Herr (Editors). Thousand Oaks, California: Sage Publications.

Welch, Michael (2006) "Human Rights Watch." Encyclopedia of Activism and Social Justice, Gary L. Anderson and Kathryn Herr (Editors). Thousand Oaks, California: Sage Publications.

Welch, Michael (2005) "Three Strikes Laws." World Encyclopedia of Police Forces and Correctional Systems. George Kurian, (Editor.

Welch, Michael (2005) "Moral Panic." Encyclopedia of Criminology, Richard Wright and J. Mitchell Miller (Editors). New York: Routledge.

Welch, Michael (2005) "Chain Gangs." Encyclopedia of Prisons. Mary Bosworth (Editor), Pp. 108-112. Thousand Oaks, California: Sage Publications.

Welch, Michael (2005) "Jack Abbott" Encyclopedia of Prisons. Mary Bosworth (Editor), Pp. 1-2. Thousand Oaks, California: Sage Publications.

Welch, Michael (2005) "Immigration and Naturalization Service Detention Centers Encyclopedia of Prisons . Mary Bosworth (Editor), Pp.476-479. Thousand Oaks, California: Sage Publications.

Welch, Michael (2002) "Assembly Line Justice." Encyclopedia of Crime and Punishment, David Levinson (Editor), Pp.77-80. Great Barrington, Mass.: Berkshire Reference Work/Sage.

Welch, Michael (2000) "Adultery" In Encyclopedia of Women and Crime, Nicole Hahn Rafter (Editor), P. 5. Phoenix, Arizona: The Orix Press.

Welch, Michael (1996) "Prisonization." In Encyclopedia of American Prisons, Marilyn D. McShane and Frank P. Williams (Editors), Pp.357-363. New York: Garland Publishing. The Encyclo-pedia was awarded "Outstanding Reference Work 1997" by the American Library Association.