| https://www.egr.msu.edu/decs/sites/default/files/webform/poster_print_request/_sid_/22-ways-to-contact-all-nippon-airways-customer-service-by-phone-and-chat-a-complete-guide.pdf |
| https://www.egr.msu.edu/decs/sites/default/files/webform/poster_print_request/_sid_/22-ways-to-contact-austrian-airlines-customer-service-by-phone-and-chat-a-complete-guide.pdf |
| https://www.egr.msu.edu/decs/sites/default/files/webform/poster_print_request/_sid_/22-ways-to-contact-breeze-airways-customer-service-by-phone-and-chat-a-complete-guide.pdf |
| https://www.egr.msu.edu/decs/sites/default/files/webform/poster_print_request/_sid_/22-ways-to-contact-ethiopian-airlines-customer-service-by-phone-and-chat-a-complete-guide.pdf |
| https://www.egr.msu.edu/decs/sites/default/files/webform/poster_print_request/_sid_/22-ways-to-contact-frontier-airlines-customer-service-by-phone-and-chat-a-complete-guide.pdf |
