Παραπομπή APA

Hughes, T. P. (1971). Elmer Sperry: Inventor and engineer. Baltimore: The Johns Hopkins University Press.

Παραπομπή Chicago Style

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

Παραπομπή MLA

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

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