Cita APA (7a ed.)

(1955). Biographical memoir of Elmer Ambrose Sperry 1860- 1930. National Academy of Sciences.

Cita Chicago Style (17a ed.)

Biographical Memoir of Elmer Ambrose Sperry 1860- 1930. Washington, D. C: National Academy of Sciences, 1955.

Cita MLA (9a ed.)

Biographical Memoir of Elmer Ambrose Sperry 1860- 1930. National Academy of Sciences, 1955.