https://www.uncrownedarmory.com/forums/topic/1698-faqs-%E2%84%A2-list-of-delta-airlines%C2%AE-customer%C2%A9-service%E2%84%97-247-live-person-support-numbers-a-complete-guides/
https://www.hitmanforum.com/t/complete-list-of-expedi-official-customer-service-u-s-based-contact-numbers-a-step-by-step-guide/25607
https://www.uncrownedarmory.com/forums/topic/1698-faqs-%E2%84%A2-list-of-delta-airlines%C2%AE-customer%C2%A9-service%E2%84%97-247-live-person-support-numbers-a-complete-guides/ uncrownedarmory.com
https://www.hitmanforum.com/t/complete-list-of-expedi-official-customer-service-u-s-based-contact-numbers-a-step-by-step-guide/25607 hitmanforum.com
