Cita APA (7a ed.)

Calvert, E. R. (1973). Capital punishment in the twentieth century. Patterson Smith reprint series in criminology, law enforcement, and social problems.

Cita Chicago Style (17a ed.)

Calvert, Eric R. "Capital Punishment in the Twentieth Century." Patterson Smith Reprint Series in Criminology, Law Enforcement, and Social Problems 1973.

Cita MLA (9a ed.)

Calvert, Eric R. "Capital Punishment in the Twentieth Century." Patterson Smith Reprint Series in Criminology, Law Enforcement, and Social Problems, 1973.