Cita APA (7th ed.)
Pieper, J. (1986). On hope. Ignatius Press.
Cita Chicago (17th ed.)
Pieper, Josef. On Hope. San Francisco (CA): Ignatius Press, 1986.
Cita MLA (9th ed.)
Pieper, Josef. On Hope. Ignatius Press, 1986.
Atenció: Aquestes cites poden no estar 100% correctes.