Cita APA (7th ed.)
Easton, S. C., & Wieruszowski, H. (1961). The era of Charlemagne: Frankish state and society. Van Nostrand.
Cita Chicago (17th ed.)
Easton, Stewart Copinger, i Helene Wieruszowski. The Era of Charlemagne: Frankish State and Society. Princeton, N. J.: Van Nostrand, 1961.
Cita MLA (9th ed.)
Easton, Stewart Copinger, i Helene Wieruszowski. The Era of Charlemagne: Frankish State and Society. Van Nostrand, 1961.
Atenció: Aquestes cites poden no estar 100% correctes.