APA (7e ed.) Bronvermelding

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 (17e ed.) Bronvermelding

Ward, David C., Dorothy Moss, en John Fagg. The Sweat of Their Face: Portraying American Workers. Washington, DC: Smithsonian Books ; In association with the National Portrait Gallery, 2017.

MLA (8e ed.) Bronvermelding

Ward, David C., et al. The Sweat of Their Face: Portraying American Workers. Smithsonian Books ; In association with the National Portrait Gallery, 2017.