https://cris.unu.edu/sites/cris.unu.edu/files/webform/thirty-3-ways-to-reach-a-human-at-alaska-airlines-via-email-call-or-chat.pdf

https://cris.unu.edu/sites/cris.unu.edu/files/webform/20-ways-to-reach-alaska-airlines-customer-care-and-speak-to-a-live-agent-via-phone-chat-or-email.pdf

https://cris.unu.edu/sites/cris.unu.edu/files/webform/twenty-six-ways-to-call-and-talk-to-a-human-at-jetblue-airlines-customer-help-center.pdf

https://cris.unu.edu/sites/cris.unu.edu/files/webform/thirty-one-ways-to-talk-to-a-human-at-turkish-airlines-real-support–via-call-chat-or-email.pdf

https://www.wikitree.com/wiki/Space:2025_Guide_Ten_Ways_to_Speak_to_Live_Agent_at_American_Airlines%E2%84%A2%EF%B8%8Fthrough_Contact_Options_a_Complete_Step_by_Step_Guide

https://cris.unu.edu/sites/cris.unu.edu/files/webform/17-ways-to-get-turkish-airlines-help-via-phone-call-email-or-live-chat.pdf

https://www.wikitree.com/wiki/Space:Ninty_6_Ways_To_Speak_How_To_Contact_To_Live_Agent_At_Expedia_%C2%AE%EF%B8%8F_A_Complete_Guide

https://cris.unu.edu/sites/cris.unu.edu/files/webform/09-maneras-de-contactar-con-un-agente-en-vivo-en-southwest-airlines-una-gu-a-r-pida.pdf

https://www.martview-forum.com/dev/index.php?threads/42926/

https://regions-and-cities.europa.eu/sites/default/files/webform/multimedia_center/_sid_/Atenci%C3%B3n-al-cliente-Expedia-%C2%BFC%C3%B3mo-puedo-comunicarme-con-Expedia-en-espa%C3%B1ol.pdf