Gill, J. 1. a. (1979). Byzantium and the Papacy 1198-1400. Rutgers University Press.
Cita Chicago Style (17a ed.)Gill, Joseph 1901-1989 autor. Byzantium and the Papacy 1198-1400. New Brunswick, [etc.]: Rutgers University Press, 1979.
Cita MLA (9a ed.)Gill, Joseph 1901-1989 autor. Byzantium and the Papacy 1198-1400. Rutgers University Press, 1979.
Precaución: Estas citas no son 100% exactas.