Johnson, P. (1983). Modern times: The world from the twenties to the eighties. Harper & Row.
Lua i Stíl Chicago (17ú heag.)Johnson, Paul. Modern Times: The World from the Twenties to the Eighties. New York [u.a.]: Harper & Row, 1983.
Lua MLA (8ú heag.)Johnson, Paul. Modern Times: The World from the Twenties to the Eighties. Harper & Row, 1983.
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