Levenson, J. A. (1991). Circa 1492: Art the age of exploration. National Gallery of Art.
Chicago-viite (17. p.)Levenson, Jay A. Circa 1492: Art the Age of Exploration. Washington, D.C: National Gallery of Art, 1991.
MLA-viite (9. p.)Levenson, Jay A. Circa 1492: Art the Age of Exploration. National Gallery of Art, 1991.
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