MACPHERSON DUNCAN. (2007). BREAKTHROUGH BUSINESS DEVELOPMENT: A90-DAY PLAN TO BUILD YOUR CLIENT BASE AND TAKE YOUR BUSINESS ? JOHN WILEY & SONS.
Lua i Stíl Chicago (17ú heag.)MACPHERSON DUNCAN. BREAKTHROUGH BUSINESS DEVELOPMENT: A90-DAY PLAN TO BUILD YOUR CLIENT BASE AND TAKE YOUR BUSINESS ? CANADA: JOHN WILEY & SONS, 2007.
Lua MLA (9ú heag.)MACPHERSON DUNCAN. BREAKTHROUGH BUSINESS DEVELOPMENT: A90-DAY PLAN TO BUILD YOUR CLIENT BASE AND TAKE YOUR BUSINESS ? JOHN WILEY & SONS, 2007.
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