APA (7th ed.) Citation

Einhard, a. 7., & Halphen, L. (1923). Vie de Charlemagne. H. Champion.

Chicago Style (17th ed.) Citation

Einhard, approximately 770-840, and Louis Halphen. Vie De Charlemagne. Paris: H. Champion, 1923.

MLA (8th ed.) Citation

Einhard, approximately 770-840, and Louis Halphen. Vie De Charlemagne. H. Champion, 1923.

Warning: These citations may not always be 100% accurate.