PALMER, R., & COLTON, J. (1971). A history of the modern world.-- ed.4. Alfred A.Knopf.
Lua i Stíl Chicago (17ú heag.)PALMER, R.R, agus Joel COLTON. A History of the Modern World.-- Ed.4. New York: Alfred A.Knopf, 1971.
Lua MLA (9ú heag.)PALMER, R.R, agus Joel COLTON. A History of the Modern World.-- Ed.4. Alfred A.Knopf, 1971.
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