https://business.columbia.edu/sites/forms/files-efs/webform/2023_deming_cup_nomination_and_a/_sid_/HowdoIgetahumanatExpediainus.pdf

https://www.chess.com/library/collections/what-days-are-frontier-cheap-to-fly-BGVauXwk

https://speakerdeck.com/ytghegjhrn/18-ways-to-contact-corsair-international-r-customer-service-by-phone-number-email-or-chat-step-by-step

https://tiltify.com/@2-ways-to-reach-wizz-air-customer-service-by-us-phone-ch/profile

https://business.columbia.edu/sites/forms/files-efs/webform/2023_deming_cup_nomination_and_a/_sid_/Expedia-Dispute-Charge.pdf

https://business.columbia.edu/sites/forms/files-efs/webform/2023_deming_cup_nomination_and_a/_sid_/CHODUSINGH.pdf

https://www.eventbookings.com/b/event/what-is-the-cheapest-day-to-fly-with-american-airlines

https://speakerdeck.com/ytghegjhrn/twelve-usa-ways-to-speak-to-a-human-support-agent-at-air-europa-r-a-step-by-step

https://www.eventbookings.com/b/event/what-is-the-cheapest-day-to-fly-with-american-airlines

https://www.eventbookings.com/b/event/what-is-the-cheapest-day-to-fly-with-american-airlines