Cita APA (7a ed.)

Gertwagen, R., & Jeffreys, E. (2012). Shipping, trade and crusade in the medieval Mediterranean: Studies in honour of John Pryor. Ashgate.

Cita Chicago Style (17a ed.)

Gertwagen, Ruth, y Elizabeth Jeffreys. Shipping, Trade and Crusade in the Medieval Mediterranean: Studies in Honour of John Pryor. Farnham, Surrey: Ashgate, 2012.

Cita MLA (9a ed.)

Gertwagen, Ruth, y Elizabeth Jeffreys. Shipping, Trade and Crusade in the Medieval Mediterranean: Studies in Honour of John Pryor. Ashgate, 2012.