APA aipamena

Tierney, B. (1983). The middle ages (4th ed.). New York, N.Y.: Alfred A. Knopf.

Chicago Style aipamena

Tierney, Brian. The Middle Ages. 4th ed. New York, N.Y.: Alfred A. Knopf, 1983.

MLA aipamena

Tierney, Brian. The Middle Ages. 4th ed. New York, N.Y.: Alfred A. Knopf, 1983.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.