APA-referens (7:e uppl.)

GUPTA P K. (2007). SERVICES MARKETING (6TH.). EVEREST PUBLISHING HOUSE.

Chicago-referens (17:e uppl.)

GUPTA P K. SERVICES MARKETING. 6TH. PUNE: EVEREST PUBLISHING HOUSE, 2007.

MLA-referens (9:e uppl.)

GUPTA P K. SERVICES MARKETING. 6TH. EVEREST PUBLISHING HOUSE, 2007.