Cita APA (7a ed.)

Unamuno y Jugo, M. d., Kerrigan, A., & Nozick, M. (1974). The agony of Christianity and essays on faith. Princeton University Press.

Cita Chicago Style (17a ed.)

Unamuno y Jugo, Miguel de, Anthony Kerrigan, y Martin Nozick. The Agony of Christianity and Essays on Faith. [Princeton, N.J.]: Princeton University Press, 1974.

Cita MLA (9a ed.)

Unamuno y Jugo, Miguel de, et al. The Agony of Christianity and Essays on Faith. Princeton University Press, 1974.