| https://www.experts-exchange.com/questions/29291465/19-Ways-to-Speak-With-Ethiopian-Airlines-USA-Contact-Numbers-A-Complete-Help-Guide.html |
| https://ctl.gatech.edu/sites/default/files/webform/teaching_with_technology_partner/_sid_/12-ways-to-communicate-with-united-airlines-customer-service-via-phone-number-chat-and-email-options.pdf |
| https://ctl.gatech.edu/sites/default/files/webform/teaching_with_technology_partner/_sid_/14-ways-to-communicate-with-united-airlines-customer-service-via-phone-number-chat-and-email-options.pdf |
| https://ctl.gatech.edu/sites/default/files/webform/teaching_with_technology_partner/_sid_/eleven-ways-to-access-united-airlines-customer-service-via-phone-number-chat-and-email-options.pdf |
| https://ctl.gatech.edu/sites/default/files/webform/teaching_with_technology_partner/_sid_/eleven-ways-to-contact-united-airlines-customer-service-via-phone-number-chat-and-email-options_0.pdf |
| https://ctl.gatech.edu/sites/default/files/webform/teaching_with_technology_partner/_sid_/five-ways-to-connect-to-united-airlines-customer-service-via-phone-number-chat-and-email-options.pdf |
| https://ctl.gatech.edu/sites/default/files/webform/teaching_with_technology_partner/_sid_/nine-ways-to-contact-united-airlines-customer-service-via-phone-number-chat-and-email-options.pdf |
| https://ctl.gatech.edu/sites/default/files/webform/teaching_with_technology_partner/_sid_/seven-ways-to-contact-united-airlines-customer-service-via-phone-number-chat-and-email-options.pdf |
| https://ctl.gatech.edu/sites/default/files/webform/teaching_with_technology_partner/_sid_/seven-ways-to-get-in-touch-with-united-airlines-customer-service-via-phone-number-chat-and-email-options.pdf |
| https://ctl.gatech.edu/sites/default/files/webform/teaching_with_technology_partner/_sid_/sixteen-ways-to-access-united-airlines-customer-service-via-phone-number-chat-and-email-options.pdf |