PORTER, K. V. (1971). Case Studies In Human Relations Kenneth V Porter. Macmilan.
Lua i Stíl Chicago (17ú heag.)PORTER, Kenneth V. Case Studies In Human Relations Kenneth V Porter. Macmilan, 1971.
Lua MLA (8ú heag.)PORTER, Kenneth V. Case Studies In Human Relations Kenneth V Porter. Macmilan, 1971.
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