APA-čujuhus (7. p.)
Turner, F. J., & Worthington, A. (2015). The fontier in American history. Open Road Integrated Media.
Chicago-čujuhus (17. p.)
Turner, Frederick Jackson, juo Andrea Worthington. The Fontier in American History. New York, New York: Open Road Integrated Media, 2015.
MLA-čujuhus (9. p.)
Turner, Frederick Jackson, juo Andrea Worthington. The Fontier in American History. Open Road Integrated Media, 2015.
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