National Museum of American Art (U.S.), Denver Art Museum, St. Louis Art Museum, Truettner, W. H., & Anderson, N. K. (1991). The West as America: Reinterpreting images of the frontier, 1820-1920. Published for the National Museum of American Art by the Smithsonian Institution Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)National Museum of American Art (U.S.), Denver Art Museum, St. Louis Art Museum, William H. Truettner, و Nancy K. Anderson. The West as America: Reinterpreting Images of the Frontier, 1820-1920. Washington: Published for the National Museum of American Art by the Smithsonian Institution Press, 1991.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)National Museum of American Art (U.S.), et al. The West as America: Reinterpreting Images of the Frontier, 1820-1920. Published for the National Museum of American Art by the Smithsonian Institution Press, 1991.