https://community.activecampaign.com/t/complete-list-of-official-expedi-contact-numbers-in-the-usa-full-detailed-guide/28102

https://community.activecampaign.com/t/help-70-smart-ways-to-call-american-airlines-usa-contact-numbers-a-definitive-guide/28082

https://form.jotform.com/252146347927059

https://intercom.help/agregar-infante/en/articles/11921654-hablar-directamente-con-klm-airlines-para-asistencia-en-conexion-de-vuelos

https://www.biggerpockets.com/forums/921/topics/1254232-live-how-to-speak-to-a-live-agent-at-emirates-airlines

https://intercom.help/agregar-infante/en/articles/11921630-conectese-con-un-agente-en-vivo-en-klm-airlines-para-resolver-inconvenienteshttps://intercom.help/agregar-infante/en/articles/11921630-conectese-con-un-agente-en-vivo-en-klm-airlines-para-resolver-inconvenienteshttps://intercom.help/agregar-infante/en/articles/11921630-conectese-con-un-agente-en-vivo-en-klm-airlines-para-resolver-inconvenientes

https://community.activecampaign.com/t/live-agent-talk-to-someone-at-delta-usa-contact-numbers-the-detailed-guide/28065

https://www.biggerpockets.com/forums/921/topics/1254231-help-hub-talk-to-live-agent-at-etihad-airline-usa-customer-service-step-b

https://www.biggerpockets.com/forums/921/topics/1254227-live-how-to-speak-to-a-live-agent-at-singapore-airlines

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