APA (7th ed.) Citation

O'Malley, J. W. (2008). What happened at Vatican II. Belknap Press of Harvard University Press.

Chicago Style (17th ed.) Citation

O'Malley, John W. What Happened at Vatican II. Cambridge, Mass.: Belknap Press of Harvard University Press, 2008.

MLA (8th ed.) Citation

O'Malley, John W. What Happened at Vatican II. Belknap Press of Harvard University Press, 2008.