APA (7th ed.) Citation

Hughes, T. P. (1971). Elmer Sperry; inventor and engineer. Johns Hopkins Press.

Chicago Style (17th ed.) Citation

Hughes, Thomas Parke. Elmer Sperry; Inventor and Engineer. Baltimore: Johns Hopkins Press, 1971.

MLA (9th ed.) Citation

Hughes, Thomas Parke. Elmer Sperry; Inventor and Engineer. Johns Hopkins Press, 1971.