Besterfield, D. (2014). Quality improvement (Pearson new international edition.). Pearson Education Limited.
Lua i Stíl Chicago (17ú heag.)Besterfield, Dale. Quality Improvement. Pearson new international edition. Edinburgh Gate: Pearson Education Limited, 2014.
Lua MLA (8ú heag.)Besterfield, Dale. Quality Improvement. Pearson new international edition. Pearson Education Limited, 2014.
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