Lawrence, F. B., Jennings, D. F., & Reynolds, B. E. (2005). ERP in distribution. Thomson/South-Western.
Lua i Stíl Chicago (17ú heag.)Lawrence, F. Barry, Daniel F. Jennings, agus Brian E. Reynolds. ERP in Distribution. Mason, Ohio: Thomson/South-Western, 2005.
Lua MLA (8ú heag.)Lawrence, F. Barry, et al. ERP in Distribution. Thomson/South-Western, 2005.
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