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.
ציטוט MLALefevre, Henry L. Quality Service Pays: Six Keys to Success. Vanity, 1997.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.