Sanyal, Shouvik, and Mohammed Wamique Hisam. “An Analysis of the Impact of Service Quality and Passenger Satisfaction on Passenger Preference for Airlines : A Study of the Indian Aviation Sector”. International Review of Management and Marketing, vol. 6, no. 2, Apr. 2016, pp. 354-7, https://econjournals.com/index.php/irmm/article/view/2075.