Cita APA (7a ed.)

Howell, R. (1987). The Royal Navy and the slave trade. Croom Helm.

Cita Chicago Style (17a ed.)

Howell, Raymond. The Royal Navy and the Slave Trade. London [u.a.]: Croom Helm, 1987.

Cita MLA (9a ed.)

Howell, Raymond. The Royal Navy and the Slave Trade. Croom Helm, 1987.