Cita APA (7a ed.)

Canning, G., & Jupp, P. (1991). The letter-journal of George Canning, 1793-1795. The Royal Historical Society.

Cita Chicago Style (17a ed.)

Canning, George, y Peter Jupp. The Letter-journal of George Canning, 1793-1795. London: The Royal Historical Society, 1991.

Cita MLA (9a ed.)

Canning, George, y Peter Jupp. The Letter-journal of George Canning, 1793-1795. The Royal Historical Society, 1991.