Bittel, L. R. (1978). Encyclopedia of professional management. Grolier International.
Chicago Style (17th ed.) CitationBittel, Lester Robert. Encyclopedia of Professional Management. Danbury, Connecticut: Grolier International, 1978.
ציטוט MLABittel, Lester Robert. Encyclopedia of Professional Management. Grolier International, 1978.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.