APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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