Παραπομπή σε μορφή APA (7η εκδ.)

Clarke, J. F., & Hupchick, D. P. (1988). The pen and the sword: Studies in Bulgarian history. East European monographs;, Columbia University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Clarke, James Franklin, και Dennis P. Hupchick. The Pen and the Sword: Studies in Bulgarian History. Boulder : New York: East European monographs;, Columbia University Press, 1988.

Παραπομπή σε μορφή MLA (9th εκδ.)

Clarke, James Franklin, και Dennis P. Hupchick. The Pen and the Sword: Studies in Bulgarian History. East European monographs;, Columbia University Press, 1988.