NEWBY TONY. (1996). CUSTOMER SERVICE POCKETBOOK. RESEARC PRESS BUSINESS BOOKS.
Čikaški stil citiranja (17. izdanje)NEWBY TONY. CUSTOMER SERVICE POCKETBOOK. NEW DELHI: RESEARC PRESS BUSINESS BOOKS, 1996.
MLA način citiranja (9. izdanje)NEWBY TONY. CUSTOMER SERVICE POCKETBOOK. RESEARC PRESS BUSINESS BOOKS, 1996.
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