American Public Transportation Association

American Public Transportation Association）。 Public Transit Ridership Report, First Quarter 2013 (PDF). American Public Transportation Association. [12

End-of-Year 2014 (PDF). Public Transportation Ridership Report. American Public Transportation Association. [9 March 2015]. （原始内容 (PDF)存档于11 October 2017）.  Executive

S. public transportation systems from the Federal Transit Administration （页面存档备份，存于互联网档案馆）, part of DOT American Public Transportation Association （页面存档备份，存于互联网档案馆）

Ridership Report First Quarter 2023 (PDF). 美國公共運輸協會（英语：American Public Transportation Association）. 2023-05-30 [2023-07-05] （美国英语）.  Transit Ridership Report

  PUBLIC TRANSPORTATION RIDERSHIP REPORT Fourth Quarter & End-of-Year 2014 （页面存档备份，存于互联网档案馆）, American Public Transportation Association（英语：American Public