Butler, E. (1950). Conspiracy of silence. Hodder & Stoughton.
Lua i Stíl Chicago (17ú heag.)Butler, Ewan. Conspiracy of Silence. London: Hodder & Stoughton, 1950.
Lua MLA (8ú heag.)Butler, Ewan. Conspiracy of Silence. Hodder & Stoughton, 1950.
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