Bittel, L. R. (1985). Encyclopedia of professional management. Grolier International.
Čikaški stil citiranja (17. izdanje)Bittel, Lester Robert. Encyclopedia of Professional Management. Danbury, Conn: Grolier International, 1985.
MLA način citiranja (9. izdanje)Bittel, Lester Robert. Encyclopedia of Professional Management. Grolier International, 1985.
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