Citazione Stile APA (7a Edizione)

Ricker, J., & Saywell, J. (1978). Medieval Europe: The birth of a new civilization (3. ed.). Clarke, Irwin.

Citazione stile Chigago Style (17a edizione)

Ricker, John, e John Saywell. Medieval Europe: The Birth of a New Civilization. 3. ed. Toronto [u.a.]: Clarke, Irwin, 1978.

Citatione MLA (9a ed.)

Ricker, John, e John Saywell. Medieval Europe: The Birth of a New Civilization. 3. ed. Clarke, Irwin, 1978.