Cita APA (7a ed.)
O'Malley, J. W. What Happened at Vatican II. Harvard University.
Cita estilo Chicago (17a ed.)
O'Malley, John W. What Happened at Vatican II. Cambridge, EUA: Harvard University.
Cita MLA (9a ed.)
O'Malley, John W. What Happened at Vatican II. Harvard University.
Precaución: Estas citas no son 100% exactas.