(1969). A Brief Guide to the National Gallery of Art: Washington D.C. U. S. Government Printing Office.
Chicagoスタイル(17版)引用形式A Brief Guide to the National Gallery of Art: Washington D.C. U. S. Government Printing Office, 1969.
MLA(8版)引用形式A Brief Guide to the National Gallery of Art: Washington D.C. U. S. Government Printing Office, 1969.
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