Lange, Katie. „Pentagon history: Seven big things to know“. Aerotech News (2019-yil 21-dekabr). 2021-yil 1-oktyabrda asl nusxadan arxivlangan. Qaraldi: 2021-yil 1-oktyabr. „The first tenants moved into the building in April 1942, several months before the building was finished.“.
„The Pentagon“. dcmilitary.com (2016-yil 19-fevral). — „Three shifts worked 24 hours a day, every day, building the Pentagon, wedge by wedge.“. 2021-yil 1-oktyabrda asl nusxadan arxivlangan. Qaraldi: 2021-yil 1-oktyabr.
Isikoff, Michael; Klaidman, Daniel. „The Hijackers We Let Escape“. Newsweek (2002-yil 10-iyun). 2009-yil 31-oktyabrda asl nusxadan arxivlangan. Qaraldi: 2009-yil 22-oktyabr.
„Construction to Completion“. The Pentagon Tours. United States Department of Defense. 2016-yil 3-aprelda asl nusxadan arxivlangan. Qaraldi: 2016-yil 20-iyul.
„Five-By-Five: The Making of the Pentagon“. PDH Center (2014). — „One section was completed on April 30, 1942 [sic] and the first tenants moved in.“. 2021-yil 1-oktyabrda asl nusxadan arxivlangan. Qaraldi: 2021-yil 1-oktyabr.
„Construction to Completion“. The Pentagon Tours. United States Department of Defense. 2016-yil 3-aprelda asl nusxadan arxivlangan. Qaraldi: 2016-yil 20-iyul.
„The Pentagon“. dcmilitary.com (2016-yil 19-fevral). — „Three shifts worked 24 hours a day, every day, building the Pentagon, wedge by wedge.“. 2021-yil 1-oktyabrda asl nusxadan arxivlangan. Qaraldi: 2021-yil 1-oktyabr.
„Five-By-Five: The Making of the Pentagon“. PDH Center (2014). — „One section was completed on April 30, 1942 [sic] and the first tenants moved in.“. 2021-yil 1-oktyabrda asl nusxadan arxivlangan. Qaraldi: 2021-yil 1-oktyabr.
Lange, Katie. „Pentagon history: Seven big things to know“. Aerotech News (2019-yil 21-dekabr). 2021-yil 1-oktyabrda asl nusxadan arxivlangan. Qaraldi: 2021-yil 1-oktyabr. „The first tenants moved into the building in April 1942, several months before the building was finished.“.
Isikoff, Michael; Klaidman, Daniel. „The Hijackers We Let Escape“. Newsweek (2002-yil 10-iyun). 2009-yil 31-oktyabrda asl nusxadan arxivlangan. Qaraldi: 2009-yil 22-oktyabr.