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.
芝加哥风格引文Ward, David C., Dorothy Moss, 与 John Fagg. The Sweat of Their Face: Portraying American Workers. Washington, DC: Smithsonian Books ; In association with the National Portrait Gallery, 2017.
MLA引文Ward, David C., et al. The Sweat of Their Face: Portraying American Workers. Smithsonian Books ; In association with the National Portrait Gallery, 2017.
警告：这些引文格式不一定是100％准确.