COLLIS JILL. (2007). BUSINESS RESEARCH: A PRACTICAL GUIDE FOR UNDERGRADUATE AND POSTGRADUATE STUDENTS (2ND.). PALGRAVE MACMILLAN.
Lua i Stíl Chicago (17ú heag.)COLLIS JILL. BUSINESS RESEARCH: A PRACTICAL GUIDE FOR UNDERGRADUATE AND POSTGRADUATE STUDENTS. 2ND. NEW YORK: PALGRAVE MACMILLAN, 2007.
Lua MLA (9ú heag.)COLLIS JILL. BUSINESS RESEARCH: A PRACTICAL GUIDE FOR UNDERGRADUATE AND POSTGRADUATE STUDENTS. 2ND. PALGRAVE MACMILLAN, 2007.
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