https://cris.unu.edu/sites/cris.unu.edu/files/webform/30-ways-to-reach-volaris-airlines-support-by-email-phone-live-chat-via-call-email-or-chat.pdf

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/%5BGu%C3%ADa-r%C3%A1pida%5D%C2%BFC%C3%B3mo-hablo-con-alguien-en-Volaris.pdf

https://flyairlines.zohodesk.com/portal/en/kb/articles/c%C3%B3mo-hablo-con-un-representante-de-klm

https://flyairlines.zohodesk.com/portal/en/kb/articles/c%C3%B3mo-hablo-con-un-representante-de-klm

https://writers.coverfly.com/projects/view/34eb5a1e-7562-4372-b944-65f5449c26d8/HumanCovid19_Does_American_Airlines_drop_prices_on_Tuesdays

https://flyairlines.zohodesk.com/portal/en/kb/articles/c%C3%B3mo-hablo-con-un-representante-de-klm

https://www.gamedev.net/projects/6755-como-hablar-con-un-representante-de-expedia/