Butterfield, H. (1960). International conflict in the twentieth century: A Christian view. Religious perspectives.
Cita Chicago Style (17a ed.)Butterfield, Herbert. "International Conflict in the Twentieth Century: A Christian View." Religious Perspectives 1960.
Cita MLA (8a ed.)Butterfield, Herbert. "International Conflict in the Twentieth Century: A Christian View." Religious Perspectives, 1960.
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