Cita APA (7a ed.)

Somerville, R. (1982). Scotia pontificia: Papal letters to Scotland before the pontificate of Innocent III. Clarendon Press.

Cita Chicago Style (17a ed.)

Somerville, Robert. Scotia Pontificia: Papal Letters to Scotland Before the Pontificate of Innocent III. Oxford: Clarendon Press, 1982.

Cita MLA (9a ed.)

Somerville, Robert. Scotia Pontificia: Papal Letters to Scotland Before the Pontificate of Innocent III. Clarendon Press, 1982.