Cita APA (7a ed.)

Câmara, H. (1971). Spiral of violence. Dimension Books.

Cita Chicago Style (17a ed.)

Câmara, Hélder. Spiral of Violence. Denville (New Jersey): Dimension Books, 1971.

Cita MLA (9a ed.)

Câmara, Hélder. Spiral of Violence. Dimension Books, 1971.