Cita APA (7a ed.)

Ludwig, J. (1998). Concealed-gun-carrying laws and violent crime: Evidence from state panel data. Georgetown Univ. and Northwestern Univ.

Cita Chicago Style (17a ed.)

Ludwig, Jens. Concealed-gun-carrying Laws and Violent Crime: Evidence from State Panel Data. Washington, DC: Georgetown Univ. and Northwestern Univ, 1998.

Cita MLA (9a ed.)

Ludwig, Jens. Concealed-gun-carrying Laws and Violent Crime: Evidence from State Panel Data. Georgetown Univ. and Northwestern Univ, 1998.