| https://froodl.com/full-list-of-booking-com——customer-service—usa-contact-numbers—simple–guide |
| https://travelerplus.com/travel-stories/complete-list-of-officialbookingcom-contact-numbers-in-the-usa-the-ultimate-official-guide |
| https://discourse.bring4th.org/t/royal-caribbean-usa-contact-numbers-a-step-by-step-guide/3741 |
| https://discourse.bring4th.org/t/carnival-customer-service-usa-contact-numbers-a-step-by-step-guide/3800 |
| https://discourse.bring4th.org/t/complete-list-of-booking-com-support-contact-numbers-in-the-usa-the-ultimate-explained-guide/3752 |
