Cita APA (7a ed.)

Spiegel, J. P. (1971). Theories of violence: An integrated approach. International Organization for the Study of Group Tensions.

Cita Chicago Style (17a ed.)

Spiegel, John P. Theories of Violence: An Integrated Approach. New York: International Organization for the Study of Group Tensions, 1971.

Cita MLA (8a ed.)

Spiegel, John P. Theories of Violence: An Integrated Approach. International Organization for the Study of Group Tensions, 1971.