Crosby, P. B. (2004). Quality without Tears. Orient BlackSwan.
Cita Chicago (17th ed.)Crosby, Philip B. Quality Without Tears. New Delhi: Orient BlackSwan, 2004.
Cita MLA (9th ed.)Crosby, Philip B. Quality Without Tears. Orient BlackSwan, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.