Παραπομπή σε μορφή APA (7η εκδ.)

Nash, G. B. (1991). Freedom by degrees: Emancipation in Pennsylvania and its aftermath. Oxford University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Nash, Gary B. Freedom by Degrees: Emancipation in Pennsylvania and Its Aftermath. New York: Oxford University Press, 1991.

Παραπομπή σε μορφή MLA (9th εκδ.)

Nash, Gary B. Freedom by Degrees: Emancipation in Pennsylvania and Its Aftermath. Oxford University Press, 1991.