APA (7th ed.) Citation

Austin, W. F. The Great Events by Famous Historians, Volume 05 (From Charlemagne to Frederick Barbarossa).

Chicago Style (17th ed.) Citation

Austin, Walter F. The Great Events by Famous Historians, Volume 05 (From Charlemagne to Frederick Barbarossa).

MLA (9th ed.) Citation

Austin, Walter F. The Great Events by Famous Historians, Volume 05 (From Charlemagne to Frederick Barbarossa).

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