Bell, S. (2006). Lean Enterprise systems using IT for continuous improvement Steve Bell. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Bell, Steve. Lean Enterprise Systems Using IT for Continuous Improvement Steve Bell. McGraw-Hill, 2006.
Lua MLA (8ú heag.)Bell, Steve. Lean Enterprise Systems Using IT for Continuous Improvement Steve Bell. McGraw-Hill, 2006.
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