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"World Trade Center Progress"(PDF). The Port Authority of New York and New Jersey. February 2010. p. 2. Archived from the original(PDF) on 2015-09-24. Retrieved 2014-08-31.
"Línea 1" [Line 1] (in Spanish). Oficina para el Reordenamiento de Transporte (OPRET). Archived from the original on 2013-10-21. Retrieved 2013-09-17.
"Línea 2 – 1ra Etapa" [Line 2 – 1st Stage] (in Spanish). Oficina para el Reordenamiento de Transporte (OPRET). Archived from the original on 2013-09-30. Retrieved 2013-09-17.
wmata.com
"About Metro". Washington Metropolitan Area Transit Authority. 2014. Archived from the original on 2016-12-02. Retrieved 2014-08-28.