APA (7th ed.) Citation

Smithsonian Institution. Office of the Secretary & Langley, S. P. (1904). Exhibit of Smithsonian Astrophysical Observatory. [publisher not identified].

Chicago Style (17th ed.) Citation

Smithsonian Institution. Office of the Secretary and S. P. Langley. Exhibit of Smithsonian Astrophysical Observatory. Washington, D.C.: [publisher not identified], 1904.

MLA (9th ed.) Citation

Smithsonian Institution. Office of the Secretary and S. P. Langley. Exhibit of Smithsonian Astrophysical Observatory. [publisher not identified], 1904.