CROCKER, O. L. (1984). Quality Circles A Guide To Participations And Productivity Olga L. Crocker, John Sik Leung Chiu. Methuen.
Chicago-viite (17. p.)CROCKER, Olga L. Quality Circles A Guide To Participations And Productivity Olga L. Crocker, John Sik Leung Chiu. Methuen, 1984.
MLA-viite (8. p.)CROCKER, Olga L. Quality Circles A Guide To Participations And Productivity Olga L. Crocker, John Sik Leung Chiu. Methuen, 1984.
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