Cita APA (7a ed.)

Hildebrandt, M. M. (1992). The external school in Carolingian society. Brill.

Cita Chicago Style (17a ed.)

Hildebrandt, M. M. The External School in Carolingian Society. Leiden [etc.]: Brill, 1992.

Cita MLA (9a ed.)

Hildebrandt, M. M. The External School in Carolingian Society. Brill, 1992.