https://www.scribd.com/document/947191131/1-800-209-3032-Delta-Customer-Service

https://www.scribd.com/document/947191127/1-800-209-3032-Lufthansa-Customer-Service

https://mycampus.wnmu.edu/wp-content/uploads/formidable/75/expedia-24-hour-customer-service.pdf

https://mycampus.wnmu.edu/wp-content/uploads/formidable/75/expedia-customer-service-live.pdf

https://mycampus.wnmu.edu/wp-content/uploads/formidable/75/Complete-List-of-Expedia-Customer-Service-Contact-Numbers-Live.pdf

https://mycampus.wnmu.edu/wp-content/uploads/formidable/75/united-airlines.pdf

https://youtu.be/M_9FlEjbEhI

https://flighttraining.co.nz/wp-content/uploads/fsqm-files/Complete-List-of-klm-AiRline-Official-Customer-Service-Contact-Number-Assistance-Guide_KL.pdf

https://flighttraining.co.nz/wp-content/uploads/fsqm-files/FAQs-Full-List-of-Air-Canada-Airlines-Tm-Official-Customer-Service-Numbers-Quick-Guide-1.pdf

https://under40.it/webcommunity/wp-content/uploads/fsqm-files/0omND5Zzh0XrGZrCQuick-Updated-List-of-American-Airlines-tm-Official-Customer-Service-24-7-Live-Person-Support-Contact-Numbers-a-Assistance-Guide.pdf