Cita APA (7a ed.)

Sullivan, R. E. (1974). Aix-la-Chapelle in the age of Charlemagne (1st ed., 2nd printing.). University of Oklahoma Press.

Cita Chicago Style (17a ed.)

Sullivan, Richard E. Aix-la-Chapelle in the Age of Charlemagne. 1st ed., 2nd printing. Norman: University of Oklahoma Press, 1974.

Cita MLA (9a ed.)

Sullivan, Richard E. Aix-la-Chapelle in the Age of Charlemagne. 1st ed., 2nd printing. University of Oklahoma Press, 1974.