APA (7th ed.) Citation

Nelson, J. L., & Deutsches Historisches Institut <London>. (2009). Opposition to Charlemagne. Inst.

Chicago Style (17th ed.) Citation

Nelson, Janet L., and Deutsches Historisches Institut <London>. Opposition to Charlemagne. London: Inst, 2009.

MLA (8th ed.) Citation

Nelson, Janet L., and Deutsches Historisches Institut <London>. Opposition to Charlemagne. Inst, 2009.