Cita APA (7a ed.)

Tillich, P. (1965). The courage to be (3rd impression.). Collins.

Cita Chicago Style (17a ed.)

Tillich, Paul. The Courage to Be. 3rd impression. London [etc.]: Collins, 1965.

Cita MLA (9a ed.)

Tillich, Paul. The Courage to Be. 3rd impression. Collins, 1965.