APA-Zitierstil (7. Ausg.)

Perry, G. J. M. (2013). John of Brienne: King of Jerusalem, emperor of Constantinople, c.1175-1237. Cambridge University Press.

Chicago-Zitierstil (17. Ausg.)

Perry, Guy J. M. John of Brienne: King of Jerusalem, Emperor of Constantinople, C.1175-1237. Cambridge ; New York: Cambridge University Press, 2013.

MLA-Zitierstil (9. Ausg.)

Perry, Guy J. M. John of Brienne: King of Jerusalem, Emperor of Constantinople, C.1175-1237. Cambridge University Press, 2013.