Παραπομπή APA

Singh, L. (2008). Marketing in service industry: Airline, travel, tours and hotel. Isha books.

Παραπομπή Chicago Style

Singh, L.K. Marketing in Service Industry: Airline, Travel, Tours and Hotel. New Delhi: Isha books, 2008.

Παραπομπή MLA

Singh, L.K. Marketing in Service Industry: Airline, Travel, Tours and Hotel. Isha books, 2008.