APA (7th ed.) Citation

Calvert, E. R. (1973). Capital punishment in the twentieth century. Patterson Smith.

Chicago Style (17th ed.) Citation

Calvert, E. Roy. Capital Punishment in the Twentieth Century. Montclair, N.J.: Patterson Smith, 1973.

MLA (9th ed.) Citation

Calvert, E. Roy. Capital Punishment in the Twentieth Century. Patterson Smith, 1973.