- https://uroc.ucmerced.edu/sites/g/files/ufvvjh1956/f/webform/united-airlines-help-center-phone-numbers-usa.pdf
- https://uroc.ucmerced.edu/sites/g/files/ufvvjh1956/f/webform/qatar-airways-usa-customer-service-contact-numbers-a-step-by-step-guide_1_1.pdf
- https://uroc.ucmerced.edu/sites/g/files/ufvvjh1956/f/webform/all-american-contact-numbers-for-customers-in-usa.pdf
- https://uroc.ucmerced.edu/sites/g/files/ufvvjh1956/f/webform/complete-list-of-delta-airlines-customer-service-usa-contact-numbers-full-detailed-guide_0.pdf
- https://uroc.ucmerced.edu/sites/g/files/ufvvjh1956/f/webform/turkish-airlines-customer-service-numbers-24-7-live-support_1.pdf
- https://uroc.ucmerced.edu/sites/g/files/ufvvjh1956/f/webform/singaporer_airlines_usa_customer_servicer_contact_numbers_a_step-by-step_guidetm_.pdf
- https://uroc.ucmerced.edu/sites/g/files/ufvvjh1956/f/webform/alaska-airlines-aadvantage-customer-service.pdf
- https://uroc.ucmerced.edu/sites/g/files/ufvvjh1956/f/webform/turkishr_airlines_helpline_numbers_-_direct_access_to_customer_care.pdf
- https://uroc.ucmerced.edu/sites/g/files/ufvvjh1956/f/webform/srilankanrairlinesrcustomer_servicetm_contact_numbersr_-a_step_by_step_guide.pdf
- https://uroc.ucmerced.edu/sites/g/files/ufvvjh1956/f/webform/srilankanr_airlinesr_helpline_numbers_-_direct_access_to_customer_care.pdf
- https://uroc.ucmerced.edu/sites/g/files/ufvvjh1956/f/webform/spiritrairlinesrcustomer_servicetm_contact_numbersr_-a_step_by_step_guide.pdf
- https://uroc.ucmerced.edu/sites/g/files/ufvvjh1956/f/webform/spirit_r_airlines_helpline_numbers_-_direct_access_to_customer_care.pdf
- https://uroc.ucmerced.edu/sites/g/files/ufvvjh1956/f/webform/spirit_r_airlines_helpline_numbers_-_direct_access_to_customer_care_0.pdf
- https://uroc.ucmerced.edu/sites/g/files/ufvvjh1956/f/webform/southwesttmairlinesrcustomer_servicetm_contact_numbersr_-a_step_by_step_guide.pdf
- https://uroc.ucmerced.edu/sites/g/files/ufvvjh1956/f/webform/singaporetmairlinesrcustomer_servicetm_contact_numbersr_-a_step_by_step_guide.pdf