https://www.goodreads.com/quotes/12688995-cuanto-cobra-copa-airlines-por-una-maleta-extra-copa-airlines

https://www.goodreads.com/quotes/12689002-how-do-i-complain-to-to-file-a-complaint

https://support.google.com/chrome/thread/335146853?hl=id&sjid=4665196491907053315-NA

https://community.ring.com/conversations/ring-device-tips/dayoffer-what-is-the-cheapest-day-to-buy-tickets-on/67eb65aa66bea62fe182da45

https://www.goodreads.com/quotes/12689045-getting-in-touch-with-a-live-customer-service-representative-at

https://www.goodreads.com/quotes/12688994-cuanto-cobra-copa-airlines-por-una-maleta-extra-copa-airlines

https://support.google.com/edu/classroom/thread/335147050?hl=en&sjid=13285839114290103117-NA

https://intercom.help/frontier-helpline/en/articles/11009304-quick-guide-to-changing-your-flight-date-on-southwest-airlines

https://www.goodreads.com/quotes/12689002-how-do-i-complain-to-to-file-a-complaint

https://intercom.help/air-united/en/articles/11009099-1-800-839-5035-como-hablar-con-un-representante-de-level-airlines