Παραπομπή σε μορφή APA (7η εκδ.)

Bonnassie, P., & Birrell, J. (1991). From slavery to feudalism in south-western Europe. Cambridge University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Bonnassie, Pierre, και Jean Birrell. From Slavery to Feudalism in South-western Europe. Cambridge: Cambridge University Press, 1991.

Παραπομπή σε μορφή MLA (9th εκδ.)

Bonnassie, Pierre, και Jean Birrell. From Slavery to Feudalism in South-western Europe. Cambridge University Press, 1991.