https://www.biggerpockets.com/forums/921/topics/1254182-live-agent-talk-to-someone-at-united-usa-contact-numbers-the-detailed-guide

https://intercom.help/agregar-infante/en/articles/11921273-conectese-con-un-agente-en-vivo-en-alaska-airlines-para-asistencia-post-vuelohttps://intercom.help/agregar-infante/en/articles/11921273-conectese-con-un-agente-en-vivo-en-alaska-airlines-para-asistencia-post-vuelo

https://intercom.help/agregar-infante/en/articles/11921268-llamar-a-un-agente-en-vivo-en-alaska-airlines-sin-perder-tiempo

https://intercom.help/agregar-infante/en/articles/11921263-hable-con-un-agente-en-vivo-en-alaska-airlines-opciones-en-espanol

https://www.dancelifemap.com/events/united-states/new-york/new-york/livetalk-to-someone-at-expedia-customer-service%ef%b8%8fusa-contact-numbers-the-detailed-guide-2/

https://www.biggerpockets.com/forums/921/topics/1254169-2025-customer-support-guide-how-to-speak-to-someone-at-westjet-airlines-usa

https://intercom.help/agregar-infante/en/articles/11921252-comunicate-con-un-agente-en-vivo-de-alaska-airlines-por-asistencia-medica

https://www.dancelifemap.com/events/united-states/new-york/new-york/talk-to-someone-at-expedia-customer-service%ef%b8%8f-usa-through-contact-numbers/

https://www.biggerpockets.com/forums/921/topics/1254133-allegiant-usa-contact-numbers-a-quick-guide

https://www.cucei.udg.mx/maestrias/biotecnologia/sites/default/files/webform/vivaendelta.pdf