Cita APA (7a ed.)

Tillich, P. (1980). The Courage to be. Yale University Press.

Cita Chicago Style (17a ed.)

Tillich, Paul. The Courage to Be. New Haven London: Yale University Press, 1980.

Cita MLA (9a ed.)

Tillich, Paul. The Courage to Be. Yale University Press, 1980.