Gaya APA

Niebuhr, R. (-1965). Beyond tragedy, essays on the Christian interpretation of history. Copyright 1937. . New York: Charles Scribner's Sons.

Gaya MLA

Niebuhr, Reinhold.(1892-1971). "Beyond tragedy, essays on the Christian interpretation of history. Copyright 1937. ". New York: Charles Scribner's Sons, -1965. Buku.