BITTEL LESTER R. (1985). HANDBOOK FOR PROFESSIONAL MANAGERS. MCGRAW-HILL.
Dyfyniad Arddull ChicagoBITTEL LESTER R. HANDBOOK FOR PROFESSIONAL MANAGERS. NEW YORK: MCGRAW-HILL, 1985.
Dyfyniad MLABITTEL LESTER R. HANDBOOK FOR PROFESSIONAL MANAGERS. MCGRAW-HILL, 1985.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.