Crocker Olga L. (1984). Quality circles: A guide to participation and productivity. Methuen.
Citazione stile Chigago Style (17a edizione)Crocker Olga L. Quality Circles: A Guide to Participation and Productivity. Toronto: Methuen, 1984.
Citatione MLA (9a ed.)Crocker Olga L. Quality Circles: A Guide to Participation and Productivity. Methuen, 1984.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.