References
Expedia Media Services (2016) Connecting the Digital Dots: The Motivations and Mindset of Online Travelers, Expedia, available here (07-12-2017).
Kharpal, A. (2017) Smartphone market is worth $355 billion, with 6 billion devices in circulation by 2020: Report, CNBC, available here (14.12.2017).
Sheivachman, A. (2017) Mobile Travel Booking will Reach 40 Percent of Online Sales in 2017, Skift, available here (08-12-2017).
Phocuswright (2015) 5 Tips Inspired by Our New Traveler Survey, TripAdvisor, available here (13/12/2017).
TripAdvisor (2015) TripAdvisor Study Reveals 42% of Travelers Worldwide Use Smartphones to Plan or Book their Trips, TripAdvisor, available here (01/12/2017).
TripAdvisor (2016) TripBarometer 2016: Traveler Trends & Motivations Global Findings, TripAdvisor, available [here](https://d2bxpc4ajzxry0.cloudfront.net/TripAdvisorInsights/sites/default/files/downloads/2750/tripbarometer_2016_full_report_-_04_oct_2016_-_st12.compressed.pdf (07-12-2017).