https://papers.ssrn.com/sol3/papers.cfm?abstract_id=5309448

https://www.dfrobot.com/forum/topic/366646

https://legacystories.org/storyboard/entry/how-to-contact-expedia-customer-service-10-fast-and-easy-ways-that-work

https://legacystories.org/storyboard/entry/seven-ways-to-reach-expedia-customer-service-for-customer-services-phone-email-and-chat-solutions

https://legacystories.org/storyboard/entry/ten-ways-to-call-to-live-agent-at-american-airlines-through-contact-options-a-complete-step-by-step-guide

https://legacystories.org/storyboard/entry/fifteen-ways-to-reach-expedia-customer-service-for-customer-services-phone-email-and-chat-solutions

https://mforum.cari.com.my/forum.php?mod=viewthread&tid=5447187

https://legacystories.org/storyboard/entry/top-10-ways-to-call-quickbooks-enterprise-support

https://paperswithcode.com/method/12-ways-heres-how-to-fix-issues-with

https://legacystories.org/storyboard/entry/12-w-a-y-s-to-call-how-can-i-speak-to-live-agent-at-expedia-a-step-by-step-guide