Cita APA (7th ed.)

Ribeiro, A. (1963). When the wolves howl. Cape.

Cita Chicago (17th ed.)

Ribeiro, Aquilino. When the Wolves Howl. London: Cape, 1963.

Cita MLA (8th ed.)

Ribeiro, Aquilino. When the Wolves Howl. Cape, 1963.