Cita APA (7th ed.)
Heckel, R. V., & Shumaker, D. M. (2001). Children who murder: A psychological perspective. Praeger.
Cita Chicago (17th ed.)
Heckel, Robert V., i David M. Shumaker. Children Who Murder: A Psychological Perspective. Westport, Conn.: Praeger, 2001.
Cita MLA (9th ed.)
Heckel, Robert V., i David M. Shumaker. Children Who Murder: A Psychological Perspective. Praeger, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.