https://www.umass.edu/facforms/sites/default/files/webform/Southwest-Airlines-USA-Contact-Numbers-An-Official-Guide.pdf
https://www.umass.edu/facforms/sites/default/files/webform/Southwest-Airlines%C2%AE%EF%B8%8F-USA-Contact-Numbers%E2%84%A2%EF%B8%8F-An-Official-Guide.pdf