FOLLETT ROBERT. (1978). HOW TO KEEP SCORE IN BUSINESS. MENTOR BOOKS.
Čikaški stil citiranja (17. izdanje)FOLLETT ROBERT. HOW TO KEEP SCORE IN BUSINESS. NEW YORK: MENTOR BOOKS, 1978.
MLA način citiranja (9. izdanje)FOLLETT ROBERT. HOW TO KEEP SCORE IN BUSINESS. MENTOR BOOKS, 1978.
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