Cita APA (7a ed.)

Roberts, L. L. (1981). An analysis of fatal assaults upon law enforcement officers which occurred in the United States from 1972 through 1978. Univ. Microfilms Internat.

Cita Chicago Style (17a ed.)

Roberts, Larry L. An Analysis of Fatal Assaults upon Law Enforcement Officers Which Occurred in the United States from 1972 Through 1978. Ann Arbor, Mich: Univ. Microfilms Internat, 1981.

Cita MLA (8a ed.)

Roberts, Larry L. An Analysis of Fatal Assaults upon Law Enforcement Officers Which Occurred in the United States from 1972 Through 1978. Univ. Microfilms Internat, 1981.