Palmer, R. R., & Colton, J. (1956). A history of the modern world (Second edition.). Alfred A. Knopf.
Lua i Stíl Chicago (17ú heag.)Palmer, R. R., agus Joel Colton. A History of the Modern World. Second edition. New York: Alfred A. Knopf, 1956.
Lua MLA (8ú heag.)Palmer, R. R., agus Joel Colton. A History of the Modern World. Second edition. Alfred A. Knopf, 1956.
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