GUPTA P K. (2002). SERVICES MARKETING. EVEREST PUBLICATIONS.
芝加哥风格引文GUPTA P K. SERVICES MARKETING. PUNE: EVEREST PUBLICATIONS, 2002.
MLA引文GUPTA P K. SERVICES MARKETING. EVEREST PUBLICATIONS, 2002.
警告：这些引文格式不一定是100％准确.
APA引文