Cita APA (7th ed.)
Niebuhr, H. R. (1959). The kingdom of God in America. Harper & Row.
Cita Chicago (17th ed.)
Niebuhr, H. Richard. The Kingdom of God in America. New York: Harper & Row, 1959.
Cita MLA (9th ed.)
Niebuhr, H. Richard. The Kingdom of God in America. Harper & Row, 1959.
Atenció: Aquestes cites poden no estar 100% correctes.