Cita APA (7a ed.)
Niebuhr, H. R., & Niebuhr, R. R. (1989). Faith on earth: An inquiry into the structure of human faith. Yale University Press.
Cita Chicago Style (17a ed.)
Niebuhr, H. Richard, y Richard R. Niebuhr. Faith on Earth: An Inquiry into the Structure of Human Faith. New Haven, CT: Yale University Press, 1989.
Cita MLA (9a ed.)
Niebuhr, H. Richard, y Richard R. Niebuhr. Faith on Earth: An Inquiry into the Structure of Human Faith. Yale University Press, 1989.
Precaución: Estas citas no son 100% exactas.