Cita APA (7a ed.)

Martin, B., Barbosa, & Reeves, M. (1981). John Newton and the slave trade (1. publ., 11. impression.). Longmans.

Cita Chicago Style (17a ed.)

Martin, Bernard, Barbosa, y Marjorie Reeves. John Newton and the Slave Trade. 1. publ., 11. impression. London: Longmans, 1981.

Cita MLA (9a ed.)

Martin, Bernard, et al. John Newton and the Slave Trade. 1. publ., 11. impression. Longmans, 1981.