BERRY LEONARD L. (1991). MARKETING SERVICES: COMPETING THROUGH QUALITY. FREE PRESS.
芝加哥风格引文BERRY LEONARD L. MARKETING SERVICES: COMPETING THROUGH QUALITY. NEW YORK: FREE PRESS, 1991.
MLA引文BERRY LEONARD L. MARKETING SERVICES: COMPETING THROUGH QUALITY. FREE PRESS, 1991.
警告：这些引文格式不一定是100％准确.