„America's FavoriteArchitecture”(PDF). NPR. The American Institute of Architects; Harris Interactive. 2007. Архивирано из оригинала(PDF) 20. 09. 2017. г. Приступљено 21. 10. 2017.
nps.gov
npgallery.nps.gov
Pitts, Carolyn (26. 4. 1985). „Empire State Building”(PDF). National Historic Landmark Nomination. National Park Service.
Rothstein, Edward (15. 7. 2011). „A View Inside King Kong's Perch”. The Times. The New York Times Company. Приступљено 27. 5. 2013. „The walkway circles around the building's narrow spire, which, in 1930, was envisioned as a mooring mast for dirigibles.”
„America's FavoriteArchitecture”(PDF). NPR. The American Institute of Architects; Harris Interactive. 2007. Архивирано из оригинала(PDF) 20. 09. 2017. г. Приступљено 21. 10. 2017.
webcitation.org
„Empire State Building”. National Historic Landmark summary listing. National Park Service. 11. 9. 2007. Архивирано из оригинала 28. 8. 2011. г.
