TY - BOOK AU - Zeithaml, Valarie A., Parasuraman, A. and Berry, Leonard L. TI - Delivering quality service: : balancing customer perceptions and expectations SN - 0029357012 U1 - 658.562 PY - 1990/// CY - New York PB - ; The Free Press KW - Management KW - Quality Control KW - Quality Management ER -