APA (7th ed.) Citation

True, W. P. (1946). The first hundred years of the Smithsonian Institution: 1846-1946. [s.n.].

Chicago Style (17th ed.) Citation

True, Webster Prentiss. The First Hundred Years of the Smithsonian Institution: 1846-1946. Washington, D.C.: [s.n.], 1946.

MLA (9th ed.) Citation

True, Webster Prentiss. The First Hundred Years of the Smithsonian Institution: 1846-1946. [s.n.], 1946.