Checklist of the permanent collection /
National Portrait Gallery, Smithsonian Institution.

APA Citation

National Portrait Gallery (Smithsonian Institution). (1975). Checklist of the permanent collection. Washington: Smithsonian Institution Press : for sale by the Supt. of Docs., U.S. Govt. Print. Off..

MLA Citation

National Portrait Gallery (Smithsonian Institution). Checklist of the Permanent Collection. Washington: Smithsonian Institution Press : for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1975.

Warning: These citations may not always be complete (especially for serials).