APA

Harland G. 1., . (1960). The thought of Reinhold Niebuhr. New York: Oxford University Press.

Chicago

Harland Gordon 1920, . 1960. The thought of Reinhold Niebuhr. New York: Oxford University Press.

Harvard

Harland G. 1., . (1960). The thought of Reinhold Niebuhr. New York: Oxford University Press.

MLA

Harland Gordon 1920, . The thought of Reinhold Niebuhr. New York: Oxford University Press. 1960.