Bittel, L. R. (1978). Encyclopaedia of professional management. Grolier.
Chicago Edition CitationBittel, Lester Robert. Encyclopaedia of Professional Management. Connecticut: Grolier, 1978.
Cita MLABittel, Lester Robert. Encyclopaedia of Professional Management. Grolier, 1978.
Atenció: Aquestes cites poden no estar 100% correctes.