Cita APA (7th ed.)
Dalzell, F. (2009). Engineering invention: Frank J. Sprague and the U.S. electrical industry. MIT Press.
Cita Chicago (17th ed.)
Dalzell, Frederick. Engineering Invention: Frank J. Sprague and the U.S. Electrical Industry. Cambridge, MA: MIT Press, 2009.
Cita MLA (9th ed.)
Dalzell, Frederick. Engineering Invention: Frank J. Sprague and the U.S. Electrical Industry. MIT Press, 2009.
Atenció: Aquestes cites poden no estar 100% correctes.