https://www.goodreads.com/quotes/14861851-is-air-france-open-on-24-7-air-france-customer-service

https://codefling.com/forums/topic/4536-full-list-of-british-airways%C2%A0%C2%AE%C2%AE-customer-service%E2%84%A2-usa-contact-numbers-a-step-by-step-guide/

https://codefling.com/forums/topic/4523-full-list-of-iberia-%C2%AE%C2%AE-customer-service%E2%84%A2-usa-contact-numbers-a-step-by-step-guide/

https://codefling.com/forums/topic/4508-full-list-of-united-airlines%C2%AE%C2%AE-customer-service%E2%84%A2-usa-contact-numbers-a-step-by-step-guide/

https://codefling.com/forums/topic/4484-full-list-of-delta-airlines%C2%AE%C2%AE-customer-service%E2%84%A2-usa-contact-numbers-a-step-by-step-guide/

https://ist.mit.edu/sites/default/files/webform/infinite/ser7t6rfhu.pdf

https://codefling.com/forums/topic/4907-full-list-of-bookingcom%C2%AE%EF%B8%8F-customer%C2%A9-service%E2%84%97-usa-contact-numbers-your-expert-guide/

https://codefling.com/forums/topic/4434-full-list-of-expedia-%C2%AE%C2%AE-customer-service%E2%84%A2-usa-contact-numbers-a-step-by-step-guide/

https://www.goodreads.com/quotes/14861603-is-air-france-open-24-7-does-air-france-operate-24-hours

https://www.goodreads.com/quotes/14861577-is-air-france-open-24-7-air-france-24-hour-helpline