Lefevre, H. L. (1997). Quality service pays: Six keys to success. Vanity.
Chicago Edition CitationLefevre, Henry L. Quality Service Pays: Six Keys to Success. New Delhi: Vanity, 1997.
Cita MLALefevre, Henry L. Quality Service Pays: Six Keys to Success. Vanity, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.