Watson, R. (1979). National Gallery of Art, Washington. Orbis Publishing.
Cita Chicago Style (17a ed.)Watson, Ross. National Gallery of Art, Washington. Londres: Orbis Publishing, 1979.
Cita MLA (8a ed.)Watson, Ross. National Gallery of Art, Washington. Orbis Publishing, 1979.
Precaución: Estas citas no son 100% exactas.