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

https://speakerdeck.com/smithkaira/how-to-connect-with-customer-service-effortlessly-phone-email-and-live-chat-support-available-anytime

https://www.winfuture-forum.de/index.php?showtopic=229019

https://speakerdeck.com/smithkaira/7-phone-numbers-chat-options-and-email-support-you-can-trust

https://www.goodreads.com/quotes/13122183-for-assistance-with-e-x-p-e-d-i-a

https://www.winfuture-forum.de/index.php?showtopic=229015

https://speakerdeck.com/smithkaira/seven-ways-how-to-speak-with-a-live-copa-airlines-customer-service-agent-via-phone-email-or-chat-without-long-wait-times

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

https://speakerdeck.com/smithkaira/complete-instructions-to-contact-avianca-airlines-customer-service-by-phone-email-or-chat-for-quick-travel-solutions

https://speakerdeck.com/smithkaira/15-ways-how-to-contact-turkish-airlines-customer-service-phone-numbers-live-chat-and-email-support-for-immediate-assistance