Ward, D. C., Moss, D., & Fagg, J. (2017). The sweat of their face: Portraying American workers. Smithsonian Books ; In association with the National Portrait Gallery.
Chicago-referens (17:e uppl.)Ward, David C., Dorothy Moss, och John Fagg. The Sweat of Their Face: Portraying American Workers. Washington, DC: Smithsonian Books ; In association with the National Portrait Gallery, 2017.
MLA-referens (8:e uppl.)Ward, David C., et al. The Sweat of Their Face: Portraying American Workers. Smithsonian Books ; In association with the National Portrait Gallery, 2017.
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