Becker, C. L. (1952). Modern history: The rise of a democratic, scientific and industrialized civilization. Silver Burdett Company.
Lua i Stíl Chicago (17ú heag.)Becker, Carl Lotus. Modern History: The Rise of a Democratic, Scientific and Industrialized Civilization. New York: Silver Burdett Company, 1952.
Lua MLA (9ú heag.)Becker, Carl Lotus. Modern History: The Rise of a Democratic, Scientific and Industrialized Civilization. Silver Burdett Company, 1952.
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