Cita APA (7a ed.)

Herrin, J., & Nelson, J. L. (2016). Ravenna: Its role in earlier medieval change and exchange. Institute of Historical Research.

Cita Chicago Style (17a ed.)

Herrin, Judith, y Janet L. Nelson. Ravenna: Its Role in Earlier Medieval Change and Exchange. London: Institute of Historical Research, 2016.

Cita MLA (8a ed.)

Herrin, Judith, y Janet L. Nelson. Ravenna: Its Role in Earlier Medieval Change and Exchange. Institute of Historical Research, 2016.