National Gallery of Art (Washington, DC). (1971). A brief guide to the National Gallery of Art of the United States of America. National Gallery of Art.
Chicago-Zitierstil (17. Ausg.)National Gallery of Art (Washington, DC). A Brief Guide to the National Gallery of Art of the United States of America. Washington <DC>: National Gallery of Art, 1971.
MLA-Zitierstil (9. Ausg.)National Gallery of Art (Washington, DC). A Brief Guide to the National Gallery of Art of the United States of America. National Gallery of Art, 1971.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.