Cita APA (7a ed.)

O'Malley, J. W. (1958). Challenge. Loyola University Press.

Cita Chicago Style (17a ed.)

O'Malley, John W. Challenge. Chicago: Loyola University Press, 1958.

Cita MLA (8a ed.)

O'Malley, John W. Challenge. Loyola University Press, 1958.