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DeBrava, Valerie (2001). "Tangan Peperangan yang Menyerang di Harper Mingguan," American Periodicals, vol. 11, ms 49-64. Di JSTOR

Halloran, Fiona Deans (2012). Thomas Nast: The Father of Modern Political Cartoons.. Chapel Hill, NC: Universiti North Carolina Press.  ISBN   978-0-80783-587-6 .

Prettyman, Gib (2001). "Harper's Weekly dan Spectacle of Industrialization," Periodicals American, vol. 11, ms 24-28. Di JSTOR