Cita APA (7a ed.)

Tillich, P., & Sturm, E. (1998). Writings in the social philosophy and ethics. De Gruyter.

Cita Chicago Style (17a ed.)

Tillich, Paul, y Erdmann Sturm. Writings in the Social Philosophy and Ethics. Berlin [etc.]: De Gruyter, 1998.

Cita MLA (9a ed.)

Tillich, Paul, y Erdmann Sturm. Writings in the Social Philosophy and Ethics. De Gruyter, 1998.