Parkinson, C. (1961). Parkinson`s Law (13th.). John Murray.
Lua i Stíl Chicago (17ú heag.)Parkinson, C. Parkinson`s Law. 13th. London: John Murray, 1961.
Lua MLA (9ú heag.)Parkinson, C. Parkinson`s Law. 13th. John Murray, 1961.
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