https://www.airwarriors.com/community/threads/general-list-of-official-expedi%F0%9D%93%AA-%E2%84%A2%EF%B8%8F-customer%C2%AE-service-contact-numbers-in-usa%C2%AE%C2%AE%E2%80%93-the-ultimate-official-guide.52935/

https://www.airwarriors.com/community/threads/official-delta%C2%AE%EF%B8%8F-customer%C2%AE-contact-numbers-in-usa-a-comprehensive-step-by-step-guide.51588/

https://www.airwarriors.com/community/threads/full-list-of-expedia%C2%AE%EF%B8%8F-customer-contact-numbers-in-usa-a-ultimate-step-by-step-easy-guide.51497/

https://www.airwarriors.com/community/threads/full-list-of-united-airlines%C2%AE%EF%B8%8F-customer-service%C2%AE-contact-numbers-in-usa-a-ultimate-step-by-step-guide.51482/

https://www.airwarriors.com/community/threads/general-list-of-norse-atlantic-airways%E2%84%A2%EF%B8%8F-contact%C2%AE%EF%B8%8F-numbers-in-the-usa%C2%AE%EF%B8%8F-24-7-liveperson-the-ultimate-detailed.51498/

https://www.pixiv.net/novel/show.php?id=25730921

https://peter.freeflarum.com/d/38-complete-list-of-official-quickbooks-customer-support-number-in-the-us

https://www.mobygames.com/forum/12/thread/272591/full-list-of-expedia-customertm-support-usa-contact-numbers/#post-272591

https://www.cucei.udg.mx/carreras/alimentos/sites/default/files/webform/how-to-communicate-with-someone-in-qatar.pdf

https://fazermen.com/forum/viewtopic.php?f=1&t=112167