https://support.google.com/edu/classroom/thread/332055592?hl=en&sjid=12055483471141921912-NA

https://www.quecochemecompro.com/opiniones/ryanair-reservations-can-you-reserve-tickets-on-ryanair-24-7-customer-support/

https://www.yelp.com/biz_photos/qatar-airways-atlanta-3?select=rgIfW_7fY3eEJ7K7q_umcA&utm_campaign=www_photo_share_popup&utm_medium=copy_link&utm_source=%28direct%29

https://intercom.help/rubbika22/en/articles/10878875-specific-term-what-is-expedia-s-cancellation-plan

https://intercom.help/rubbika22/en/articles/10878897-what-is-the-refundable-option-on-expedia-flight-travel

https://support.google.com/phoneapp/thread/332820777?hl=en&sjid=8383766159947556995-NA

https://intercom.help/rubbika22/en/articles/10878854-what-is-the-non-refundable-policy-on-expedia

https://intercom.help/rubbika22/en/articles/10878837-how-do-i-avoid-expedia-cancellation-fees

https://intercom.help/airlines-ff39a477144e/en/articles/10880946-step-by-step-guide-how-do-i-really-get-through-to-qatar-airways

https://intercom.help/qatar-9a07a6dc6ecb/en/articles/10880955-when-can-i-check-in-my-qatar-flight