Terry Allan Hicks (2006). Uncle Sam. Marshall Cavendish 2006, 40 pages. p. 9. ISBN978-0761421375. Archived from the original on August 14, 2021. Retrieved August 1, 2015.
pp. 40–41 of Albert Matthews, "Uncle Sam". Proceedings of the American Antiquarian Society, v.19, 1908. pp. 21–65. Google BooksArchived October 3, 2015, at the Wayback Machine
Matthews, Albert (1908). "Uncle Sam". Proceedings of the American Antiquarian Society, Volume 19. Archived from the original on October 3, 2015. Retrieved July 2, 2015.
Terry Allan Hicks (2006). Uncle Sam. Marshall Cavendish 2006, 40 pages. p. 9. ISBN978-0761421375. Archived from the original on August 14, 2021. Retrieved August 1, 2015.
pp. 40–41 of Albert Matthews, "Uncle Sam". Proceedings of the American Antiquarian Society, v.19, 1908. pp. 21–65. Google BooksArchived October 3, 2015, at the Wayback Machine
"Uncle Sam". Encyclopædia Britannica Online. Archived from the original on January 20, 2013. Retrieved June 9, 2012.
Matthews, Albert (1908). "Uncle Sam". Proceedings of the American Antiquarian Society, Volume 19. Archived from the original on October 3, 2015. Retrieved July 2, 2015.