AHMED P K. (2003). INTERNAL MARKETING: TOOLS AND CONCEPTS FOR MANAGEMENT. BUTTERWORTH-HEINEMANN.
Lua i Stíl Chicago (17ú heag.)AHMED P K. INTERNAL MARKETING: TOOLS AND CONCEPTS FOR MANAGEMENT. OXFORD: BUTTERWORTH-HEINEMANN, 2003.
Lua MLA (9ú heag.)AHMED P K. INTERNAL MARKETING: TOOLS AND CONCEPTS FOR MANAGEMENT. BUTTERWORTH-HEINEMANN, 2003.
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