Citazione Stile APA (7a Edizione)

(1969). A Brief Guide to the National Gallery of Art: Washington D.C. U. S. Government Printing Office.

Citazione stile Chigago Style (17a edizione)

A Brief Guide to the National Gallery of Art: Washington D.C. U. S. Government Printing Office, 1969.

Citatione MLA (8a ed.)

A Brief Guide to the National Gallery of Art: Washington D.C. U. S. Government Printing Office, 1969.