- https://ia903205.us.archive.org/20/items/guide-baba/A_Quick_Guide_Of_%20American_Airlines-Official_CUSTOMER_SERVICE_Contact_Numbers-2026.pdf
- https://ia903205.us.archive.org/20/items/guide-baba/A_Quick_Guide_Of_Delta_Airlines-Official_CUSTOMER_SERVICE_Contact_Number-2026.pdf
- https://ia903205.us.archive.org/20/items/guide-baba/A_Quick_Guide_Of_Delta_Airlines-Official_CUSTOMER_SERVICE_Contact_Numbers.pdf
- https://ia903205.us.archive.org/20/items/guide-baba/A_Quick_Guide_Of_United_Airlines-Official_CUSTOMER_SERVICE_Contact_Numbers-2026.pdf