National Gallery of Art <Washington, DC>, & Walker, J. (1995). National Gallery of Art, Washington: By John Walker National Gallery of Art, Washington (New and revised ed.). Abrams.
Chicago-Zitierstil (17. Ausg.)National Gallery of Art <Washington, DC>, und John Walker. National Gallery of Art, Washington: By John Walker National Gallery of Art, Washington. New and revised ed. New York: Abrams, 1995.
MLA-Zitierstil (8. Ausg.)National Gallery of Art <Washington, DC>, und John Walker. National Gallery of Art, Washington: By John Walker National Gallery of Art, Washington. New and revised ed. Abrams, 1995.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.