Cita APA (7a ed.)

Thom, P. (2003). Medieval modal systems: Problems and concepts. Ashgate.

Cita Chicago Style (17a ed.)

Thom, Paul. Medieval Modal Systems: Problems and Concepts. Hampshire: Ashgate, 2003.

Cita MLA (9a ed.)

Thom, Paul. Medieval Modal Systems: Problems and Concepts. Ashgate, 2003.