Merriam, C. E. (1957). Systematic Politics Charles E. Merriam. University of Chicago.
Lua i Stíl Chicago (17ú heag.)Merriam, Charles E. Systematic Politics Charles E. Merriam. University of Chicago, 1957.
Lua MLA (8ú heag.)Merriam, Charles E. Systematic Politics Charles E. Merriam. University of Chicago, 1957.
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