APA (7th ed.) Citation

Easton, S. C., & Wieruszowski, H. (1961). The era of Charlemagne: Frankish state and society. Van Nostrand.

Chicago Style (17th ed.) Citation

Easton, Stewart Copinger, and Helene Wieruszowski. The Era of Charlemagne: Frankish State and Society. Princeton, N. J.: Van Nostrand, 1961.

MLA (9th ed.) Citation

Easton, Stewart Copinger, and Helene Wieruszowski. The Era of Charlemagne: Frankish State and Society. Van Nostrand, 1961.