BARRA RALPH. (1983). PUTTING QUALITY CIRCLES TO WORK: A PRACTICAL STRATEGY FOR BOOSTING PRODUCTIVITY & PROFITS. MCGRAW-HILL.
Chicago-Zitierstil (17. Ausg.)BARRA RALPH. PUTTING QUALITY CIRCLES TO WORK: A PRACTICAL STRATEGY FOR BOOSTING PRODUCTIVITY & PROFITS. LONDON: MCGRAW-HILL, 1983.
MLA-Zitierstil (9. Ausg.)BARRA RALPH. PUTTING QUALITY CIRCLES TO WORK: A PRACTICAL STRATEGY FOR BOOSTING PRODUCTIVITY & PROFITS. MCGRAW-HILL, 1983.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.