Cita APA (7th ed.)
Pollock, J. C. (1977). Wilberforce. Constable.
Cita Chicago (17th ed.)
Pollock, John Charles. Wilberforce. London: Constable, 1977.
Cita MLA (9th ed.)
Pollock, John Charles. Wilberforce. Constable, 1977.
Atenció: Aquestes cites poden no estar 100% correctes.