APA

Smithsonian Institution, . (1975). Increase and diffusion: a brief introduction to the Smithsonian Institution. Washington: Office of Public Affairs, Smithsonian Institution.

Chicago

Smithsonian Institution, . 1975. Increase and diffusion: a brief introduction to the Smithsonian Institution. Washington: Office of Public Affairs, Smithsonian Institution.

Harvard

Smithsonian Institution, . (1975). Increase and diffusion: a brief introduction to the Smithsonian Institution. Washington: Office of Public Affairs, Smithsonian Institution.

MLA

Smithsonian Institution, . Increase and diffusion: a brief introduction to the Smithsonian Institution. Washington: Office of Public Affairs, Smithsonian Institution. 1975.