DALE BARRIE G. (1999). MANAGING QUALITY (3RD.). BLACKWELL.
Lua i Stíl Chicago (17ú heag.)DALE BARRIE G. MANAGING QUALITY. 3RD. U.K: BLACKWELL, 1999.
Lua MLA (9ú heag.)DALE BARRIE G. MANAGING QUALITY. 3RD. BLACKWELL, 1999.
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