Newell, Clayton R. The Regular Army before the Civil War, 1845–1860(PDF). US Army Campaigns of the Civil War. US Army Center of Military History. стр. 50, 52. Приступљено 26. 5. 2022.CS1 одржавање: Формат датума (веза)
Petruzzello, Melissa. „Skyscraper”. Encyclopædia Britannica. Приступљено 21. 2. 2022. „Skyscraper, very tall, multistoried building. The name first came into use during the 1880s, shortly after the first skyscrapers were built, in the United States. The development of skyscrapers came as a result of the coincidence of several technological and social developments. The term skyscraper originally applied to buildings of 10 to 20 stories, but by the late 20th century the term was used to describe high-rise buildings of unusual height, generally greater than 40 or 50 stories.”CS1 одржавање: Формат датума (веза)
„Commercial style definition”. Dictionary of Wisconsin History. Wisconsin Historical Society. Архивирано из оригинала 11. 06. 2019. г. Приступљено 2007-06-26.
„Commercial style definition”. Dictionary of Wisconsin History. Wisconsin Historical Society. Архивирано из оригинала 11. 06. 2019. г. Приступљено 2007-06-26.
