APA (7th ed.) Citation

O'Malley, J. W. (1993). The first Jesuits. Harvard University Press.

Chicago Style (17th ed.) Citation

O'Malley, John W. The First Jesuits. Cambridge, Mass.: Harvard University Press, 1993.

MLA (8th ed.) Citation

O'Malley, John W. The First Jesuits. Harvard University Press, 1993.