Cita APA (7a ed.)

Kelly, J. F. (2004). The origins of Christmas. Liturgical Press.

Cita Chicago Style (17a ed.)

Kelly, Joseph Francis. The Origins of Christmas. Collegeville (Minnesota): Liturgical Press, 2004.

Cita MLA (9a ed.)

Kelly, Joseph Francis. The Origins of Christmas. Liturgical Press, 2004.